And what I want to think about is what is the limit of f of x as x approaches infinity? And there are several ways that you could do this. You could actually try to plug in larger and larger numbers for x and see if it seems to be approaching some value. Or you could reason through this. And when I talk about reasoning through this, it's to think about the behavior of this numerator and denominator as x gets very, very, very large. And when I'm talking about that, what I'm saying is as x gets very, very large, let's just focus on the numerator, as x gets very, very large, this term right over here in the numerator, 4x to the 5th, is going to become much, much more significant than any of these other things. Something squaring gets large, but something being raised to the 5th power gets raised that much, much faster.