Missing space from generated latex

[samgabriel]

When passing this mathmml: <math xmlns=\"http://www.w3.org/1998/Math/MathML\"> <mi>A</mi> <mo>=</mo> <mi>π</mi> <msup> <mrow> <mi>r</mi> </mrow> <mrow> <mn>2</mn> </mrow> </msup> </math> Result should be A=\pi r^{2} but the result become A=\pir^{2} missing space after \pi