Let me draw a little line here to show you that this is equal to that, not to this thing over here. This is equal to the limit as x approaches infinity. Let's factor out an x squared out of the numerator and the denominator. So you have an x squared times 4 minus 5 over x. x squared times 5 over x is going to be 5x. Divided by, let's factor an x squared out of the numerator. So x squared times 1 over x squared minus 3. And then these x squareds cancel out.