Consider add support for MathJax formulas.

[PrinOrange]

Clear and concise description of the problem

When I read RSS subscriptions from arXiv, MathSciNet, Science Direct, APS Journals, MathOverflow, Physics StackExchange and so on which only renders math formula with MathJaX engine rather than KaTeX, or some blogs use MathJaX, the formulas from RSS content may not be correctly supported and rendered.

Maybe the Follow could add the support for MathJaX rendering.

For example, here is an article use MathJax to render the formulas and variables,

This is related code from rss content

And the follow can not render the MathJaX

• Feed info: https://blog.xinshijiededa.men/atom.xml/?code=4be5df1ba77364b8b7cfde74ddb72efa
• Item ID: 41473172512130051
• Origin Article: https://blog.xinshijiededa.men/plane-electromagnetic-waves/

Suggested solution

MathJaX documentation: https://docs.mathjax.org/en/latest/
MathJaX npm package: https://www.npmjs.com/package/mathjax

Alternative

No response

Additional context

No response

Validations

• Check that there isn't already an issue that request the same feature to avoid creating a duplicate.
• This issue is valid

[linear]

FOL-1509 Consider add support for MathJax formulas.