[tex4ht] ! Bad register code (65536)., \__regex_query_set:nnn ... \l__regex_curr_pos_int MATHJAX mode

[Michal Hoftich]

Hi Nasser,

> I know the problem is due to large size of the equation.
> Editor tells me it is 208,987 characters long so I have
> to remove it.   But the question is why this error in mathjax
> only?

Because l3regex is used to clean-up the math. There are spaces before
brackets and other issues othewise. MathJax doesn't seem to like that.
So it is best to keep equation size in some reasonable limits :)

Best regards,
Michal