So if you substitute x equals negative one here, even if it's formally, if we're formally taking it away to be mathematically equivalent, this would be negative one minus two, which would be negative three, over negative one minus three, which would be negative four, which is equal to 3 4ths. So if this condition wasn't here, you could just evaluate it straight up and this is a pretty plain vanilla function. Wouldn't expect to see anything crazy happening here. And if I can just evaluate it at x equals negative one, I feel pretty good, I feel pretty good. So once again, we're now going and factoring. We're able to factor. We evaluate, we simplify it.