So we would have x to the fourth minus four x squared plus one. And from that, we will subtract x squared minus three dx. And in many other videos, we have talked about why you do this, why this makes sense to just subtract the lower graph from the upper graph when you're finding the area between them. But now we just have to evaluate this definite integral. So let's just get down to business. All right. So we have the integral from negative one to one.