Some issues about SymPy 0.7.3 for Maemo 5 : - "Plot()" using PyGlet has some bug that doesn't open the plotting window (this bug also happens on PC's, no only on Nokia N900). This issue was reported to SymPy group and solved by using some SymPy 0.7.2 code for PyGlet "Plot()"; - the new plotting module on SymPy 0.7.3 needs MatPlotLib >= 1.1.0, but Maemo 5 currently has MatPlotLib 1.0.0, so it doesn't work. I will later try to package MatPlotLib 1.2/1.3 for Maemo 5, solving this issue.