Let

So we get

Now we see that we can split it up and get

For , let , then we get

For , let , then we get

let

Thus,

Now, converting back to an equation in z, we see that the anti-derivative is

The anti-derivative (as a whole) is

Since , then we get

Now, since we *finally* see that

I (most likely) made a mistake somewhere in this calculation, but the answer is supposed to be

Try to make sense of what I did......

--Chris