So let's see, we know this is just a matter, the first part of the expression is just a matter of algebraic simplification. But the second part, we need to now take the derivative of sine of x squared. Well now, we would want to use the chain rule again. So I'm gonna take the derivative, it's sine of something. So this is going to be, the derivative of this is going to be the sine of something with respect to something. So that is cosine of that something times the derivative with respect to x of the something. In this case, the something is our x squared.