I'm taking the fourth root of another expression here, and you'd be right. And if you're dealing with a composite function, the chain rule should be front of mind. But first, let's just make this fourth root a little bit more tractable for us, and just realize that this fourth root is really nothing but a fractional exponent. So this is the same thing as the derivative with respect to x of x to the third plus four x squared plus seven to the 1 4th power. To the 1 4th power. Now, how do we take the derivative of this? Well, we can view this, as I said a few seconds ago, we can view this as a composite function.