I\'m trying to figure out how to convert a MathML representation of a math equation and convert it to the LaTeX representation of that math equation. So for example...
I had similar problem and mathparser provided in url from question wasn't working for me at all.
I converted MathML to LaTeX by using XSLT MathML Library with Saxon-HE but since XSLT MathML library is pure XSLT any XSLT transformation tool should handle it. Output is not always perfect but it gave me better results than web-xslt mentioned somewhere at stackexchange network.
Command line usage with saxon:
saxon -o output.tex input.mml xsltml_2.1.2/mmltex.xsl