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. And then from that, we are going to subtract this capital F of x, the antiderivative, evaluated at the lower bound. So that is going to be seven times negative one to the third, all of that over three. And so this first expression, let's see, this is going to be seven times three to the third over three this is 27 over three, this is going to be the same thing as seven times nine.