We can simplify a little bit. You have a 1 plus a 4. We can add the 1 to the 4 and get a 5. And now we're ready to take the antiderivative. This is going to be equal to pi times, let's take the antiderivative of all of this business, and I'll color code it. The antiderivative of y is just y squared over 2. The antiderivative of 4 times the square root of y plus 1, you just really have to think of it as 4 times y plus 1 to the 1 half power.