And then this could be our v of x. So this is v of x and v prime of x. The derivative of cosine of x with respect to x is equal to negative sine of x. And then we just apply this. So based on that, f prime of x is going to be equal to the derivative of the numerator function, that's two x right over here, that's that there. So it's gonna be two x times the denominator function. V of x is just cosine of x times cosine of x minus the numerator function, which is just x squared, x squared, times the derivative of the denominator function.