And so what is this going to be equal to? Well, let's take the antiderivative of each of these parts and then we're going to have to evaluate them at the different bounds. So let's see. The antiderivative of 16x to the negative three. We're just going to do the power rule for derivatives in reverse. You could view this as the power rule of integration or power rule of taking the antiderivative where what you do is you're going to increase our exponent by one. So you're going to go from negative three to negative two.