This is going to be, this is going to be the derivative of the function in the numerator. So d dx of u of x times the function in the denominator, times v of x, minus, minus, I'll do the, minus the function in the numerator, u of x, times the derivative of the function in the denominator, times d dx, v of x, and we're almost there, and then over, over, the function in the denominator squared. The function in the denominator squared. So this might look messy, but all we have to do now is think about, well, what is the derivative of u of x? What is the derivative of v of x? And we should just be able to substitute those things back into this expression we just wrote down. So let's do that.