On the left-hand side, it says, Avery tried to find the derivative of seven minus five x using basic differentiation rules. Here is her work. And on the right-hand side, it says, Hannah tried to find the derivative of negative three plus eight x using basic differentiation rules. Here is her work. And these are two different examples from differentiation rules exercise on Khan Academy. And I thought I would just do them side by side because we can kind of think about what each of these people are doing correct or incorrect. So these are similar expressions.