convert mathml to tex
used the xsl code from: https://github.com/transpect/mml2tex
import mml2tex from 'mml2tex';
const mml = `
<math xmlns="http://www.w3.org/1998/Math/MathML">
<msqrt>
<mn>2</mn>
</msqrt>
</math>
`;
const tex = mml2tex(mml);
console.log(tex); // \sqrt{ 2 }