Comment #10 on issue 1864 by asmeurer: AttributeError: is_commutative with
Mul(Pow(2, 2, evaluate=False), 3, evaluate=False) + 1
http://code.google.com/p/sympy/issues/detail?id=1864
Is the commented out code in operations.py supposed to illustrate
something, or did you just forget to remove
it? Otherwise, this looks good.
Also, I generally agree with you, but we also need to be careful that we
test all things that are broken to avoid
them breaking again. In this case, I wasn't entirely convinced that the
two problems were equivalent until I saw
the fix for both on your branch. Also, the test for the title expression
is fast, so it shouldn't matter.
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