Pause this video and see if you can evaluate this. So you might be saying, oh, what kind of fancy technique could I use? But you will see sometimes the fanciest or maybe the least fancy, but the best technique is to just simplify this algebraically. So in this situation, what happens if we distribute this x squared? Well, then we're going to get a polynomial here within the integral. So this is going to be equal to the integral of x squared times three x is three x to the third and then negative one times x squared is minus x squared and then that times dx. And now this is pretty straightforward to evaluate.