Comment #6 on issue 2113 by smichr: integrate(cos(log(x**2))/x) hangs
http://code.google.com/p/sympy/issues/detail?id=2113
Sorry, didn't have this flagged and didn't get the updates. I think we all
get the initial issue, don't we? In any case, the difference is that my
branch doesn't expand log(x**2) as 2*log(x) since x is not known to be
positive. It can do this without breaking other things as mentioned in the
inline comments because of other changes in t2:
# This should only run when base.is_positive, but it breaks
# nseries, so it will have to wait for the new assumptions system.
# See the variable obj2 in log._eval_nseries.
However, when I make the x positive then t2 hangs. So t2 avoided a problem
that still exists in sympy.
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