Or if I want, I could just put parentheses there. I'll actually leave it as absolute value, since that's what I've already inputted into my calculator. And so that's going to give the area of each of those cross sections perpendicular to the x-axis. And you multiply it times dx. You get the volume of that little section. Then you add them all up from x equals a to x equals 2. And luckily, we've already done a lot of the work here on our calculator.