Updates:
Labels: NeedsReview ness987
Comment #5 on issue 1388 by ness...@googlemail.com: integrate(exp(-x)*x**n,
x) fails
http://code.google.com/p/sympy/issues/detail?id=1388
In gsoc-3 (https://github.com/sympy/sympy/pull/543):
In [96]: integrate(x**n*exp(-x), x, meijerg=True)
Out[96]:
-n - 1 n + 1 -n - 1 n + 1
n⋅x ⋅x ⋅Γ(n + 1)⋅γ(n + 1, x) x ⋅x ⋅Γ(n + 1)⋅γ(n + 1, x)
───────────────────────────────────── + ───────────────────────────────────
Γ(n + 2) Γ(n + 2)
In [97]: simplify(_)
Out[97]: γ(n + 1, x)
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