Add a complexity meter or slider

- Like from 1 to 10 how complex the equation should be. Then you would have to add things like 2=(8-2)/6+1 for the easy ones and so on.
- set up a slider for a level of difficulty, like from grades In high school to graduate college. That way, people can grow the difficulty slowly, and they would have a clear goal on how hard it is to complete each level
- If there is a selectable grade level list it could have fun uses in rpg gaming for prop creation based in reality. Or practicing working through problems.