Hi Ben, I tried the original expressions that you posted and this takes 9 minutes on my pretty modest machine with branch 1766 (on which I've reworked the expand quite a bit). Try
numer = (first*second - third**2).expand(mul=1) and see what you get there. /c -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to sy...@googlegroups.com. To unsubscribe from this group, send email to sympy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.