Inline math: support for latex style formatting

### Question
I want to convert PDFs of scholarly articles to HTML preserving all equations and inline math in LaTeX format. Is there currently a support for this?

I see that `do_formula_enrichment` does it only for equations but all inline math is still returned as plain text. E.g., for this paper https://arxiv.org/pdf/2005.09267v2:

Perhaps, I missed smth in the documentation.

Many thanks in advance!

Start by reading the do_formula_enrichment entry point and reproduce the reported behavior with the linked arXiv PDF. Trace how display equations and inline math are represented during PDF-to-HTML conversion; done means inline math is preserved in LaTeX-style formatting as well as display equations, with the behavior documented or covered by tests.

Written by the indexing model from the issue text.