Actually, let me just do that. So this is going to be x to the 3rd plus four x squared plus seven. And then I wanna multiply that, and this is the chain rule. I took the derivative of the outside with respect to the inside, and I'm gonna multiply that times the derivative of the inside. So what's the derivative of u of x? u prime of x. Let's see, we're just gonna use the power rule a bunch of times.