[tex4ht] \def does not seem to work in mathjax mode.

[Michal Hoftich]

Hi Nasser,

> The problem is in the use of \def\st{\sin\theta(t)}
>
> The latex code might not be the best, but it works
> in the other systems.

Just add the macro definition to the MathJax configuration as in
http://tug.org/pipermail/tex4ht/2018q4/002129.html

Best,
Michal