So this thing right over here, we have figured out is one over the square root of x, and this thing, u prime of x, we figured out is 1 1⁄2 times x to the negative 1 1⁄2, and x to the negative 1 1⁄2, I could rewrite that as 1 1⁄2 times one over x to the 1 1⁄2, which is the same thing as 1 1⁄2 times one over the square root of x, or I could write that as one over two square roots of x. So what is this thing going to be? Well, this is going to be equal to, in green, v prime of u of x is one over the square root of x times, times u prime of x is one over two times the square root of x. Now what is this going to be equal to? Well, this is going to be equal to, this is just algebra at this point, one over, we have our two, and square root of x times square root of x is just x. So it just simplifies to one over two x. So hopefully this made sense, and I intentionally diagrammed it out so you start to get that muscle in your brain going of recognizing the composite functions, and then making a little bit more sense of some of these expressions of the chain rule that you might see in your calculus class or in your calculus textbook.