 Okay, so here's a quick video showing a little bit more about how to do this equation in the sapling practice problem. So we're trying to get this form of this equation up here. When you click in the editor space, it opens up the tools. Now before you're familiar with it, you know, you might want to just click on on various things to show what's going on. And on some of these, when you open them up, you'll see some other options. So the first thing we want to do is find the fraction. Now I know where these are, so I'm going to kind of guide you through that. Click on the fraction in the very top box you typed one. And when you click in the bottom box, you want to put the square root sign. Inside the square root, we want to put these Greek symbols. So we come over here to the Greek alphabet. And the first one is our epsilon. And we want to put a subscript on it. And the subscript is a zero, not an O, but a zero. You have to hit the right arrow key to get out from outside of that. And we'll go back to our Greek letters and put our next one, which is a mu. Click the subscript again, put our zero. And then we see what we have matches what we're supposed to get. To double check this, I'll go ahead and show you and click check answer. Now I know I went through this kind of quick, but that's the advantage of a video is you can back it up, pause it, look and see where I was pointing for all these things to find the symbols.