Now if I take the derivative of negative x with respect to x, that's going to be negative one. Fair enough. And so I took the derivative of this, I'm gonna multiply it times that, so times dy dx. And then to that, I'm going to add the derivative of this with respect to x. Well that's just going to be the second derivative of y with respect to x times this. And all I did is apply the product rule. Three y squared minus x.