Updates:
Status: Fixed
Owner: ---
Comment #15 on issue 636 by mattpap: integrate(1/(x**2+1)) should return
arctan(x)
http://code.google.com/p/sympy/issues/detail?id=636
This issue was fixed by merging 'ratint' branch:
http://git.sympy.org/?p=sympy.git;a=commit;h=c5e6ef1eb2c1e2e00679b6cdd347ac4bde2a800f
Example:
In [1]: integrate(1/(x**2+1), x)
Out[1]: atan(x)
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