Actually, there's multiple ways that we could write it, but let's just evaluate it like this, and then I'll generalize it in the next video. So this is going to be equal to the definite integral from 0 to 1. We take the pi outside. The square root of x squared is going to be x dx minus the integral. We can factor the pi out from 0 to 1 of x squared dx. And we could say this is going to be equal to pi times the antiderivative of x, which is just x squared over 2 evaluated from 0 to 1, minus pi times the antiderivative of x squared, which is x to the third over 3 evaluated from 0 to 1. This expression is equal to, and I'm going to arbitrarily switch colors just because the green is getting monotonous, pi times 1 squared over 2 minus 0 squared over 2.