So this is going to be equal to negative seven. Let's do another example. Let's say someone were to ask you, walk up to you on the street and say, quick, here's a graph, what is the value of the expression that I'm about to write down? The definite integral going from zero to four of f of x, dx, plus the definite integral going from four to six of f of x, dx. Pause this video and see if you can figure that out. Well, once again, this first part right over here going from zero to four, so what would be is would be this area, it would be this five right over here, but then we would need to subtract this area because this area is below our x-axis and above our curve. We don't know exactly what this is, but luckily we also need to take the sum of everything I just showed, but plus this right over here.