In fact, using the chain rule, you wanna find the derivative of the outside function with respect to the inside. So the derivative of sine of something with respect to that something is gonna be cosine of that something. So that's right, that's right. And then you wanna multiply that times the derivative of the inside with respect to x. So the derivative of seven x squared is 14 x. Derivative of four x is four. So this is actually, that step looks good.