So if we apply the chain rule, it's gonna be the derivative of the outside with respect to the inside, or the something to the third power, the derivative of the something to the third power with respect to that something. So it's going to be three times that something squared times the derivative with respect to x of that something. In this case, the something is sine, let me write that in a blue color, it is sine of x squared. It is sine of x squared. If I, no matter what was inside of these orange parentheses, I would put it inside of the orange parentheses and these orange brackets right over here. We learned that in the chain rule. So let's see, we know this is just a matter, the first part of the expression is just a matter of algebraic simplification.