No-markdown islands

@mb21, I think there’s some confusion, I’m not talking about support for parsing and taking action to render LaTeX, or any other language. When using MathJax in a web page for example, this is the job of the MathJax script to take LaTeX and render it appropriatelly, MathJax will understand its delimiters as $...$ or \(...)\ IIRC, and will take the stuff inside to produce rendered LaTeX, but what’s inside is just verbatim LaTeX that didn’t get pre-processed by some markdown parser, it should not.
Such job that MathJax provides using javascript, could also be provided in other context, I don’t have another example, but one can infer that it would also be necessary to not have parsing of such input that’s intended to be consumed by a script.