You fail to mention the limits of integration.

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This is what I will assume:

1)

2)The limits of integration are from .

3)And .

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We can ignore the constant and instead consider:

Use the functional substitution :

Now use the substitution :

Realize that this is the Beta Integral.

Thus,

We can convert this to the Gamma function.

So if are positive integers we end up with a nice looking result in the end.

This is Mine 6th Post!!!