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2011-05-04 10:35:34 +0100	asked a question	simplify() does not work? I enter: `sage: a, b = var('a, b'); simplify((a + b)^2 - a^2 - 2ab - b^2)` and I would expect 0 (i.e. zero) as a result from simplify(), but instead I get back unmodified: `(a + b)^2 - a^2 - 2ab - b^2` Am I missing anything? I just started using it and it looks very promissing...