Experimental version
http://fem.um.es/EjsWiki/uploads/Download/EjsS_5.2_170525.zip
now EjsS_5.2.170525 supports ability to add mathjax
copy this code into the HTML head found in run options
<script type="text/javascript" async="true"
src="http://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-AMS_CHTML">
</script>
and paste any Latex using the $$ $$ to open and close the Latex.
for example
When $$a \ne 0$$, there are two solutions to \(ax^2 + bx + c = 0\) and they are
$$x = {-b \pm \sqrt{b^2-4ac} \over 2a}.$$
Requirment
need/requires internet to work.