$$\int_0^{{\pi \over 2}} {\left| {\sin x - \cos x} \right|} \,dx$$ is equal to

$$\int_0^{{\pi \over 2}} {{e^{\sin x}}} \cos x\,xdx$$ is equal to

Direction : Consider the following for the items that follow :

Let f(x) = |x² - x - 2|

What is $\rm \int_0^2f(x)dx$ equal to

Direction : Consider the following for the items that follow :

Let f(x) = |x² - x - 2|

What is $\rm \int_h^3f(x)dx$ equal to