Status: Accepted
Owner: ----
Labels: Type-Defect Priority-Medium Integration WrongResult

New issue 1578 by Vinzent.Steinberg: failing integral
http://code.google.com/p/sympy/issues/detail?id=1578

>>> from sympy import *
>>> var('f')
f
>>> var('fn', positive=True)
fn
>>> 4*pi**2*f**2*fn**4*(fn**2 + 9*f**2)/(f**2 + fn**2)**3
4*pi**2*f**2*fn**4*(fn**2 + 9*f**2)/(f**2 + fn**2)**3
>>> integrate(_,(f,-oo,oo))
0

Expected result:

14*pi**3*fn**3

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