Or you could say, if this is lowercase f of x, what is capital F of x? Well, the reverse power rule, we increase this exponent by one. So we're going to have seven times x to the third and then we divide by that increased exponent. So seven x to the third divided by three. And we want to evaluate that at our upper bound and then subtract from that and evaluate it at our lower bound. So this is going to be equal to, so evaluating it at our upper bound, it's going to be seven times three to the third. I'll just write that, three to the third over three.