Growth and decay problems

What is equal to?

Direction for Questions (105-106): Consider the following for the two (02) items that follow: Let the curve f(x) = |x – 3|.

What is the area bounded by the curved f(x) and y = 3?

For the following three (03) items:

Consider the function f(x) = x|x|. What is the area bounded by the curve f(x), the x-axis and the lines x = -2 and x = 1?

For the following two (02) items: 

What is u + v equal to?

For the following two (02) items: