So we're just going to be left, this simplifies to 1, so we're just going to be left with the square root of y right over here. So we're just going to be, this is going to simplify to a square root of y. And what does this over here simplify to? Well, the derivative with respect to x of the square root of y, here we want to apply the chain rule, so let me make it clear. So we have plus this x, plus this x, plus whatever business this is. And I'm going to do this in blue. Well, it's going to be the derivative of the square root of something with respect to that something.