Rendering MathML in LaTeX?

You can get TeX to parse the MathML, see for example xmltex, https://www.ctan.org/pkg/xmltex which comes with some mathml setup, however I wouldn't do it that way these days, I'd convert the MathML using XSLT, see for example pmml2tex which is available on github

I had the most success with xsltml: http://xsltml.sourceforge.net