Well, this is a slightly different green. I could call this area right over here, the area under the curve y is equal to g of x, and above the positive x axis between x equals a and x equals b, we could call that the definite integral from a to b of g of x dx. Now, given these two things, let's actually think about the area under the curve of the function created by the sum of these two functions. So what do I mean by that? So let me, this is actually a fun thing to do. Let me start again. That's exactly what we have over here.