MathJaxProcess.php doesn't work

[jakejackson1]

Besides a syntax error in the file, the method $mpdf->ConvertSize() isn't available in latest development version of Mpdf.

[finwe]

Described issues fixed in development, however generated SVG causes

ng:  Division by zero in /home/finwe/www/_github/mpdf/repo-examples/vendor/mpdf/mpdf/src/Tag.php on line 4009

So further revision needed.