Well, we can apply the product rule. So first, we can say the derivative of x with respect to x, well, that is just going to be one times the other thing. So times y to the negative one power, y to the negative one power. And then we have plus x times the derivative of y to the negative one. So plus x, what's the derivative of y to the negative one power? Well, first, we can find the derivative of y to the negative one power with respect to y. We'll just leverage the power rule there.