Updates:
Status: Fixed
Comment #3 on issue 3100 by [email protected]: power rules misapplied
http://code.google.com/p/sympy/issues/detail?id=3100
This now gives:
>>> eq=S('(b**(11/3))**(5/7)')
>>> eq.subs(b,-1)
(-(-1)**(2/3))**(5/7)
>>> _.n()
0.733051871829826 - 0.680172737770919*I
>>> powdenest(eq)
(b**(11/3))**(5/7)
>>> eq.subs(b,-1).n()
0.733051871829826 - 0.680172737770919*I
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