Updates:
Labels: EasyToFix
Comment #28 on issue 565 by [email protected]: integrate does not ommit null
terms and simplify fails to handle them afterwards.
http://code.google.com/p/sympy/issues/detail?id=565
The correct answer is now given (as confirmed with wolfram alpha):
>>> integrate(-1./2 * x * sin(n * pi * x/2), [x, -2, 0])
2.0*cos(pi*n)/(pi*n) - 2.0*sin(pi*n)/(pi**2*n**2)
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