Add test for Chemistry

MathML 4.0 supports adding intent for Chemistry in the markup. We have agreed to put the tests for MathML into the fundamental test books. When the Chemistry isprovided through MathML, it would also present this information. However, the reading of the Chemistry may not be equally supported. For this reason, I would like to see a separate test for the presentation of Chemistry within MathML.

Start by locating the fundamental test books in this repository and the existing MathML intent tests. Add a separate test for the presentation of Chemistry supplied through MathML, and consider the work done when that test distinguishes presentation support from reading support.

Written by the indexing model from the issue text.