Comment #1 on issue 1513 by ronan.l...@gmail.com: complex log is not  
simplified
http://code.google.com/p/sympy/issues/detail?id=1513

simplify is rather dumb, by design I think. On the other hand:

>>> sympy.expand(sympy.log("sqrt(2)/2+sqrt(2)/2*I"), complex=True)
pi*I/4

As for your suggestion, I think it should only ever happen automatically  
when z is a
number.

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