I could rewrite this, I could rewrite this as, write it this way, one over natural log of a times natural log of x. And what's the derivative of that? Well, we could just take the constant out. One over natural log of a, that's just a number. So we're gonna get one over the natural log of a times the derivative, times the derivative with respect to x of natural log of x, of natural log of x, which we already know is one over x. So this thing right over here is one over x. So what we get is one over natural log of a times one over x, which we could write as one over natural log of a times x, times x, which is a really useful thing to know.