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. The derivative of cosine of x is negative sine x. So negative sine of x. Negative sine of x.