I'm looking for software to read and write "structured" mathematics. Would such a request be appropriate for the Tex page?
If your question is about how to write such mathematics with (La)TeX or if it is possible in your requested way at all, then the question would be on-topic, but should be well phrased nevertheless.
If you are looking for some other software, or looking for people to program one for you, then the question would be off-topic.
I believe that such tweaks in LaTeX output in PDFs are possible, so it can be on-topic here. However, I think that LaTeX is not ready for such document design, and you might somehow better do with MathJaX. And dispite MathJaX's syntax is similar to LaTeX's, it is the only common point and questions about it are off-topic.
I do not discourage you from asking, as long as it's about LaTeX.