Application of integration calculator tricks

1. Area under the curve

Steps:

First identify the upper and lower limits of the integration. If points are given just put them in their places. If not solve the equations to get the limits.
After finding the limits, make whole function in terms of x or y wrt limits.
copy question on calculator to use this calculator trick including upper and lower limits in appropriate places.
Press "=" to get required.
Watch above video for exception and better explanation.