Hi Nasser, > Any idea why this happens?
Try this, it should prevent macros in you MathJax configuration from expansion: ------- \Preamble{xhtml,p-width} %V3.0 cobfiguration \Configure{@HEAD}{\HCode{ <script> window.MathJax = { tex: { maxBuffer: 40*1024, \unexpanded{% macros: { sp: "^", sb: "_", noalign: ["\#1", 1], medskip: "", hypergeom: ["\\operatorname{hypergeom}"] %comment this line out }}, autoload: { color: [], colorV2: ['color'] }, packages: {'[+]': ['noerrors']} }, options: { ignoreHtmlClass: 'tex2jax_ignore', processHtmlClass: 'tex2jax_process' }, loader: { load: ['[tex]/noerrors'] } }; </script>\Hnewline }} \begin{document} \EndPreamble ---- Basically, I've just added the \unexpanded command. Best regards, Michal