I was looking at
http://groups.google.com/group/sage-support/browse_thread/thread/c84c02aa5fca898,
in which the poster complained of an integral Sage does incorrectly,
so I thought I'd see if Sympy could do it. In fact, Sympy fails the
simpler case below
>>> from sympy import Symbol, sin, integrate
>>> x = Symbol('x')
>>> integrate(1/sin(x)**2,x)
0
A correct answer is -1/tan(x)
Regards,
Jason Merrill
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