And then we're taking the derivative of y with respect to x. It might be a little bit clearer if you kind of thought of it as the derivative with respect to x of y as a function of x. Y as a function of x. This might be, or y as a function of x squared, which is essentially another way of writing what we had here. This might be a little bit clearer in terms of the chain rule. The derivative of y as a function of x squared with respect to y of x, so the derivative of something squared, the derivative of something squared with respect to that something, times the derivative of that something with respect to x. This is just the chain rule. I wanna say it over and over again.