So this thing can be rewritten, this thing can be rewritten as pi squared times x to the negative 2 3rd power. So now let's take the derivative of each of these, each of these pieces of this expression. So we're gonna take, we wanna evaluate what g prime of x is. So g prime of x is going to be equal to, you could view it as a derivative with respect to x of seven sine of x. So we could take, let's do the derivative operator on both sides here, just to make it clear what we're doing. So we're gonna apply it there, we're gonna apply it there, and we're going to apply it there. So this derivative, this is the same thing as this is going to be seven times the derivative of sine of x, so this is just going to be seven times cosine of x.