pdflatex

Here is a regex that should work. Note that I made a change in your LaTeX expression because I think there was an error (* sign). astr=”\frac{(\ChebyU{\ell}@{x})^2}{\frac{\pi}{2}}” import re pat = re.compile(‘\\frac\{(.*?)\}\{\\frac\{(.*?)\}\{(.*?)\}\}’) match = pat.match(astr) if match: expr=”\\frac{{{0}*{2}}}{{{1}}}”.format(*match.groups()) print expr NB: I did not include the spaces in your original expression. 0 solved Using Python … Read more