The documentation for simplify explains: Expressions always print simplified; a simplified expression is distinguished because the way it prints agrees with its underlyilng representation.
sage: x - x 0 sage: type(x - x) <class 'sage.calculus.calculus.SymbolicArithmetic'> sage: type(simplify(x - x)) <class 'sage.calculus.calculus.SymbolicConstant'> So until hit with an explicit simplify command, symbolic expressions seem retain at least some information about how they were input. Is there a way to get the input form of an expression back out? Can I ever get sage to print something like sage: (x - x).some_devious_trick() x - x I'm not as interested in trickery involving strings. If there is a way to do this, or if there could be a way to do this that wouldn't foul everything up, then extending it to operations like integrals, derivatives, sums, and products might be an interesting approach to answering the "how do I do a formal * in Sage?" question. Regards, JM --~--~---------~--~----~------------~-------~--~----~ To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sage-support URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
