So do we see a one over x dx anywhere in this original expression? Well it's kind of hiding, it's not so obvious, but this x in the denominator is essentially a one over x and then that's being multiplied by a dx. Let me rewrite this original expression to make a little bit more sense. So the first thing I'm going to do is I'm going to take the pi, I should do that in a different color since I've already used, let me take the pi and just stick it out front. So I'm going to stick the pi out in front of the integral and so this becomes the integral of, and let me write the one over natural log of x first, one over the natural log of x times one over x dx. Now it becomes a little bit clearer. These are completely equivalent statements.