Comment #2 on issue 3555 by [email protected]: Simplify Stats expressions
http://code.google.com/p/sympy/issues/detail?id=3555

I'm saying that we could convert the expression

Pow(Normal('X', 0, 1), 2)
into
ChiSquared('X', 1)

This could happen long before integration is touched. We can simplify statistics expressions before we convert them to integrals with P, E, density, etc....

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