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. So that's going to be negative one times y to the negative two power. And then we would multiply that times the derivative of y with respect to x, just an application of the chain rule, times dy dx. And remember, we know what the derivative of y with respect to x is.