Is u substitution a possibility here? Well for u substitution we want to look for an expression and its derivative. Well what happens if we set u equal to the natural log of x? Now what would du be equal to in that scenario? Well du is going to be the derivative of the natural log of x with respect to x, which is just one over x dx. This is an equivalent statement to saying that du dx is equal to one over x. So do we see a one over x dx anywhere in this original expression?