Missing needed ops for element-wise arithmetic

The following script:
```groovy
#@ OpService ops
#@ Dataset im1
#@ Dataset im2
#@ double alpha
#@output Dataset result

vars = [
"im1": im1,
"im2": im2,
"alpha": alpha
]
result = ops.eval("alpha*im1+(1-alpha)*im2", vars)
```
fails with the following error:
```
java.lang.IllegalArgumentException: No matching 'math.multiply' op

Request:
- math.multiply(
Double,
DefaultDataset)
```

Full details of the error

```
Candidates:
1. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyByte(
==> ArrayImg arg,
byte value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
2. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyDouble(
==> ArrayImg arg,
double value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
3. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyFloat(
==> ArrayImg arg,
float value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
4. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyInt(
==> ArrayImg arg,
int value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
5. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyLong(
==> ArrayImg arg,
long value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
6. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyShort(
==> ArrayImg arg,
short value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
7. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyUnsignedByte(
==> ArrayImg arg,
byte value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
8. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyUnsignedInt(
==> ArrayImg arg,
int value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
9. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyUnsignedLong(
==> ArrayImg arg,
long value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
10. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$MultiplyUnsignedShort(
==> ArrayImg arg,
short value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
11. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyByte(
==> ArrayImg arg,
byte value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
12. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyDouble(
==> ArrayImg arg,
double value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
13. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyFloat(
==> ArrayImg arg,
float value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
14. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyInt(
==> ArrayImg arg,
int value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
15. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyLong(
==> ArrayImg arg,
long value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
16. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyShort(
==> ArrayImg arg,
short value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
17. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyUnsignedByte(
==> ArrayImg arg,
byte value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
18. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyUnsignedInt(
==> ArrayImg arg,
int value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
19. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyUnsignedLong(
==> ArrayImg arg,
long value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
20. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$MultiplyUnsignedShort(
==> ArrayImg arg,
short value)
Inconvertible type: java.lang.Double => net.imglib2.img.array.ArrayImg
21. (IterableInterval out?) =
net.imagej.ops.math.IIToIIOutputII$Multiply(
IterableInterval out?,
==> IterableInterval in1,
IterableInterval in2)
Inconvertible type: java.lang.Double => net.imglib2.IterableInterval>
22. (NumericType out?) =
net.imagej.ops.math.NumericTypeBinaryMath$Multiply(
NumericType out?,
==> NumericType in1,
NumericType in2)
Inconvertible type: java.lang.Double => capture of ?
23. (int result) =
net.imagej.ops.math.PrimitiveMath$IntegerMultiply(
int a,
==> int b)
Inconvertible type: net.imagej.DefaultDataset => int
24. (long result) =
net.imagej.ops.math.PrimitiveMath$LongMultiply(
long a,
==> long b)
Inconvertible type: net.imagej.DefaultDataset => long
25. (float result) =
net.imagej.ops.math.PrimitiveMath$FloatMultiply(
float a,
==> float b)
Inconvertible type: net.imagej.DefaultDataset => float
26. (double result) =
net.imagej.ops.math.PrimitiveMath$DoubleMultiply(
double a,
==> double b)
Inconvertible type: net.imagej.DefaultDataset => double
27. (RealType out) =
net.imagej.ops.math.BinaryRealTypeMath$Multiply(
RealType out,
RealType in1,
RealType in2)
Not enough arguments: 2 < 3
28. (IterableInterval out?) =
net.imagej.ops.math.ConstantToIIOutputII$Multiply(
IterableInterval out?,
==> IterableInterval in,
NumericType value)
Inconvertible type: java.lang.Double => net.imglib2.IterableInterval>
29. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyByte(
==> PlanarImg arg,
byte value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
30. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyDouble(
==> PlanarImg arg,
double value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
31. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyFloat(
==> PlanarImg arg,
float value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
32. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyInt(
==> PlanarImg arg,
int value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
33. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyLong(
==> PlanarImg arg,
long value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
34. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyShort(
==> PlanarImg arg,
short value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
35. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyUnsignedByte(
==> PlanarImg arg,
byte value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
36. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyUnsignedInt(
==> PlanarImg arg,
int value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
37. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyUnsignedLong(
==> PlanarImg arg,
long value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
38. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$MultiplyUnsignedShort(
==> PlanarImg arg,
short value)
Inconvertible type: java.lang.Double => net.imglib2.img.planar.PlanarImg
39. (IterableInterval out?) =
net.imagej.ops.math.IIToRAIOutputII$Multiply(
IterableInterval out?,
==> IterableInterval in1,
RandomAccessibleInterval in2)
Inconvertible type: java.lang.Double => net.imglib2.IterableInterval>
40. (RandomAccessibleInterval out) =
net.imagej.ops.math.ConstantToIIOutputRAI$Multiply(
RandomAccessibleInterval out,
IterableInterval in,
NumericType value)
Not enough arguments: 2 < 3

at net.imagej.ops.DefaultOpMatchingService.singleMatch(DefaultOpMatchingService.java:432)
at net.imagej.ops.DefaultOpMatchingService.findMatch(DefaultOpMatchingService.java:97)
at net.imagej.ops.DefaultOpMatchingService.findMatch(DefaultOpMatchingService.java:83)
at net.imagej.ops.OpEnvironment.module(OpEnvironment.java:253)
at net.imagej.ops.OpEnvironment.run(OpEnvironment.java:136)
at net.imagej.ops.eval.OpEvaluator.execute(OpEvaluator.java:147)
at net.imagej.ops.eval.OpEvaluator.execute(OpEvaluator.java:135)
at net.imagej.ops.eval.OpEvaluator.mul(OpEvaluator.java:257)
at org.scijava.parse.eval.AbstractStandardStackEvaluator.execute(AbstractStandardStackEvaluator.java:214)
at net.imagej.ops.eval.OpEvaluator.execute(OpEvaluator.java:405)
at org.scijava.parse.eval.AbstractStackEvaluator.evaluate(AbstractStackEvaluator.java:70)
at org.scijava.parse.eval.AbstractEvaluator.evaluate(AbstractEvaluator.java:87)
at net.imagej.ops.eval.DefaultEval.calculate(DefaultEval.java:69)
at net.imagej.ops.eval.DefaultEval.calculate(DefaultEval.java:51)
at net.imagej.ops.special.function.UnaryFunctionOp.run(UnaryFunctionOp.java:74)
at net.imagej.ops.special.function.AbstractUnaryFunctionOp.run(AbstractUnaryFunctionOp.java:58)
at org.scijava.command.CommandModule.run(CommandModule.java:199)
at net.imagej.ops.OpEnvironment.run(OpEnvironment.java:950)
at net.imagej.ops.OpEnvironment.run(OpEnvironment.java:157)
at net.imagej.ops.OpEnvironment.eval(OpEnvironment.java:335)
at net.imagej.ops.OpEnvironment$eval.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133)
at Script1.run(Script1.groovy:12)
at org.scijava.plugins.scripting.groovy.GroovyScriptEngine.eval(GroovyScriptEngine.java:303)
at org.scijava.plugins.scripting.groovy.GroovyScriptEngine.eval(GroovyScriptEngine.java:122)
at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
at org.scijava.script.ScriptModule.run(ScriptModule.java:160)
at org.scijava.module.ModuleRunner.run(ModuleRunner.java:168)
at org.scijava.module.ModuleRunner.call(ModuleRunner.java:127)
at org.scijava.module.ModuleRunner.call(ModuleRunner.java:66)
at org.scijava.thread.DefaultThreadService$3.call(DefaultThreadService.java:238)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
```

Switching the order of the arguments of `*` instead yields:

```
java.lang.IllegalArgumentException: No matching 'math.add' op

Request:
- math.add(
PlanarImg,
PlanarImg)
```

Full details of the error

```
Candidates:
1. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddByte(
==> ArrayImg arg,
byte value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
2. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddDouble(
==> ArrayImg arg,
double value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
3. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddFloat(
==> ArrayImg arg,
float value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
4. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddInt(
==> ArrayImg arg,
int value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
5. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddLong(
==> ArrayImg arg,
long value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
6. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddShort(
==> ArrayImg arg,
short value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
7. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddUnsignedByte(
==> ArrayImg arg,
byte value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
8. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddUnsignedInt(
==> ArrayImg arg,
int value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
9. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddUnsignedLong(
==> ArrayImg arg,
long value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
10. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImageP$AddUnsignedShort(
==> ArrayImg arg,
short value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
11. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddByte(
==> ArrayImg arg,
byte value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
12. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddDouble(
==> ArrayImg arg,
double value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
13. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddFloat(
==> ArrayImg arg,
float value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
14. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddInt(
==> ArrayImg arg,
int value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
15. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddLong(
==> ArrayImg arg,
long value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
16. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddShort(
==> ArrayImg arg,
short value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
17. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddUnsignedByte(
==> ArrayImg arg,
byte value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
18. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddUnsignedInt(
==> ArrayImg arg,
int value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
19. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddUnsignedLong(
==> ArrayImg arg,
long value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
20. (ArrayImg arg) =
net.imagej.ops.math.ConstantToArrayImage$AddUnsignedShort(
==> ArrayImg arg,
short value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => net.imglib2.img.array.ArrayImg
21. (IterableInterval out?) =
net.imagej.ops.math.IIToIIOutputII$Add(
IterableInterval out?,
IterableInterval in1,
IterableInterval in2)
Inputs do not conform to op rules
out = null
in1 = PlanarImg [512x512]
in2 = PlanarImg [720x576]
22. (NumericType out?) =
net.imagej.ops.math.NumericTypeBinaryMath$Add(
NumericType out?,
==> NumericType in1,
NumericType in2)
Inconvertible type: net.imglib2.img.planar.PlanarImg => capture of ?
23. (int result) =
net.imagej.ops.math.PrimitiveMath$IntegerAdd(
==> int a,
int b)
Inconvertible type: net.imglib2.img.planar.PlanarImg => int
24. (long result) =
net.imagej.ops.math.PrimitiveMath$LongAdd(
==> long a,
long b)
Inconvertible type: net.imglib2.img.planar.PlanarImg => long
25. (float result) =
net.imagej.ops.math.PrimitiveMath$FloatAdd(
==> float a,
float b)
Inconvertible type: net.imglib2.img.planar.PlanarImg => float
26. (double result) =
net.imagej.ops.math.PrimitiveMath$DoubleAdd(
==> double a,
double b)
Inconvertible type: net.imglib2.img.planar.PlanarImg => double
27. (RealType out) =
net.imagej.ops.math.BinaryRealTypeMath$Add(
RealType out,
RealType in1,
RealType in2)
Not enough arguments: 2 < 3
28. (IterableInterval out?) =
net.imagej.ops.math.ConstantToIIOutputII$Add(
IterableInterval out?,
IterableInterval in,
==> NumericType value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => capture of ?
29. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddByte(
PlanarImg arg,
==> byte value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => byte
30. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddDouble(
PlanarImg arg,
==> double value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => double
31. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddFloat(
PlanarImg arg,
==> float value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => float
32. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddInt(
PlanarImg arg,
==> int value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => int
33. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddLong(
PlanarImg arg,
==> long value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => long
34. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddShort(
PlanarImg arg,
==> short value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => short
35. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddUnsignedByte(
PlanarImg arg,
==> byte value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => byte
36. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddUnsignedInt(
PlanarImg arg,
==> int value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => int
37. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddUnsignedLong(
PlanarImg arg,
==> long value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => long
38. (PlanarImg arg) =
net.imagej.ops.math.ConstantToPlanarImage$AddUnsignedShort(
PlanarImg arg,
==> short value)
Inconvertible type: net.imglib2.img.planar.PlanarImg => short
39. (IterableInterval out?) =
net.imagej.ops.math.IIToRAIOutputII$Add(
IterableInterval out?,
IterableInterval in1,
RandomAccessibleInterval in2)
Inputs do not conform to op rules
out = null
in1 = PlanarImg [512x512]
in2 = PlanarImg [720x576]
40. (RandomAccessibleInterval out) =
net.imagej.ops.math.ConstantToIIOutputRAI$Add(
RandomAccessibleInterval out,
IterableInterval in,
NumericType value)
Not enough arguments: 2 < 3

at net.imagej.ops.DefaultOpMatchingService.singleMatch(DefaultOpMatchingService.java:432)
at net.imagej.ops.DefaultOpMatchingService.findMatch(DefaultOpMatchingService.java:97)
at net.imagej.ops.DefaultOpMatchingService.findMatch(DefaultOpMatchingService.java:83)
at net.imagej.ops.OpEnvironment.module(OpEnvironment.java:253)
at net.imagej.ops.OpEnvironment.run(OpEnvironment.java:136)
at net.imagej.ops.eval.OpEvaluator.execute(OpEvaluator.java:147)
at net.imagej.ops.eval.OpEvaluator.execute(OpEvaluator.java:135)
at net.imagej.ops.eval.OpEvaluator.add(OpEvaluator.java:294)
at org.scijava.parse.eval.AbstractStandardStackEvaluator.execute(AbstractStandardStackEvaluator.java:221)
at net.imagej.ops.eval.OpEvaluator.execute(OpEvaluator.java:405)
at org.scijava.parse.eval.AbstractStackEvaluator.evaluate(AbstractStackEvaluator.java:70)
at org.scijava.parse.eval.AbstractEvaluator.evaluate(AbstractEvaluator.java:87)
at net.imagej.ops.eval.DefaultEval.calculate(DefaultEval.java:69)
at net.imagej.ops.eval.DefaultEval.calculate(DefaultEval.java:51)
at net.imagej.ops.special.function.UnaryFunctionOp.run(UnaryFunctionOp.java:74)
at net.imagej.ops.special.function.AbstractUnaryFunctionOp.run(AbstractUnaryFunctionOp.java:58)
at org.scijava.command.CommandModule.run(CommandModule.java:199)
at net.imagej.ops.OpEnvironment.run(OpEnvironment.java:950)
at net.imagej.ops.OpEnvironment.run(OpEnvironment.java:157)
at net.imagej.ops.OpEnvironment.eval(OpEnvironment.java:335)
at net.imagej.ops.OpEnvironment$eval.call(Unknown Source)
at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:48)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:113)
at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:133)
at Script2.run(Script2.groovy:12)
at org.scijava.plugins.scripting.groovy.GroovyScriptEngine.eval(GroovyScriptEngine.java:303)
at org.scijava.plugins.scripting.groovy.GroovyScriptEngine.eval(GroovyScriptEngine.java:122)
at javax.script.AbstractScriptEngine.eval(AbstractScriptEngine.java:264)
at org.scijava.script.ScriptModule.run(ScriptModule.java:160)
at org.scijava.module.ModuleRunner.run(ModuleRunner.java:168)
at org.scijava.module.ModuleRunner.call(ModuleRunner.java:127)
at org.scijava.module.ModuleRunner.call(ModuleRunner.java:66)
at org.scijava.thread.DefaultThreadService$3.call(DefaultThreadService.java:238)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
```

Start by reproducing the Groovy script and its math.multiply error. Read the OpEvaluator and DefaultOpMatchingService locations named in the stack trace, then trace the element-wise arithmetic operation matching. Done means the expression alpha*im1+(1-alpha)*im2 runs successfully for Dataset inputs without the reported no-matching-op exception.

Written by the indexing model from the issue text.