Let me do it over here so I have some real estate. So this is equal to negative 8, and instead of leaving this as 0 to negative 4 f of t dt, let's change the bounds of integration here, especially so that we can get the lower number as the lower bound. And that way it becomes a little bit more natural to think of it in terms of areas. So this expression right here can be rewritten as the negative of the integral between negative 4 and 0 f of t dt. And now this expression right over here is the area under f of t, or in this case f of x, or the area under f, between negative 4 and 0. So it's this area right over here. And we have to be careful because this part over here is below the x-axis, so this we would consider negative area, we would think of it in integration terms, and this would be positive area.