Using captions on math figures (LaTeX)

[ErroneousBosch]

Describe the bug
Using the Captions package in LaTeX, captions may be added to math figures using the folloing kinds of syntax:

\[ F9X=x\int_{t=0}^\infty g(x) dx \]
\captionof{figure}{Equation one}

\begin{figure}
  \[ F9X=x\int_{t=0}^\infty g(x) dx \]
  \caption{Equation three}
\end{figure}

PanDoc discards this information completely:

Which in other utilities is rendered below the figure in a PDF (source: OverLeaf):

Using a caption here is very useful in PDF, and could be used as alt text for MarkDown and HTML instead of just the equation in LaTeX as is seen now.

• PanDoc 2.5 for Linux

[mb21]

This might have to wait until we have native figure elements in pandoc's AST: #3177

btw. if you're going from LaTeX to PDF, no need to use pandoc, just use pdflatex directly...

[ErroneousBosch]

I'm actually looking at LaTeX -> ePub/HTML, but Kindle support for MathML is terrible. In any case, the loss of this caption information is not great.