Comment #3 on issue 2624 by asmeurer: Sympy 0.7.1 can't integrate Gaussians
http://code.google.com/p/sympy/issues/detail?id=2624
And another issue of poor simplification:
In [2]: integrate(exp(-x**2 + 2*x - 1), (x, -oo, oo))
Out[2]:
⎽⎽⎽ ⎽⎽⎽
╲╱ π ⋅(-erf(1) + 1) ╲╱ π ⋅(erf(1) + 1)
─────────────────── + ──────────────────
2 2
In [3]: integrate(exp(-x**2)*exp(2*x)*exp(-1), (x, -oo, oo))
Out[3]:
⎽⎽⎽ ⎽⎽⎽
╲╱ π ⋅(-erf(1) + 1) ╲╱ π ⋅(erf(1) + 1)
─────────────────── + ──────────────────
2 2
But at least it works.
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