So let's do that. So what this is going to be, this is going to be equal to, so we're gonna take our outside function, which I'm highlighting in green now, so where I take something to the 1 4th, I'm gonna take the derivative of that with respect to the inside, with respect to u of x. Well, I'm just gonna use the power rule here. I'm just gonna bring that 1 4th out front. So it's going to be 1 4th times whatever I'm taking the derivative with respect to, to the 1 4th minus one power. Look, all I did is use the power rule here. I didn't have an x here.