Example of using MathML in HackMD

As a quick example, here is an identity of Ramanujan, as native <math>:

$\frac{1}{\left(\sqrt{\varphi \sqrt{5}}-\varphi \right)e^{\frac{2}{5}\pi }}=1+\frac{e^{-2\pi }}{1+\frac{e^{-4\pi }}{1+\frac{e^{-6\pi }}{1+\frac{e^{-8\pi }}{1+\mathrm{\dots }}}}}$

And markdown use can neatly continue afterwards.

P.S. Currently (Jan 2023), this may need a bit of custom CSS styling for Chrome. I have used a <style> tag containing:

math {
  font-family: "STIX Two Math";
}

mfrac > * {
  font-size:inherit;
  padding: 0.1em;
}