Question: Evaluate the following line integral using the Fundamental theorem of line Integrals:

\[\begin{aligned} & \int\limits_{C}{\left[ \,2\,\left( \,x\ +\ y\, \right)\ i\quad +\quad 2\,\left( \,x\ +\ y\, \right)\ j \right]}\ \cdot \ d\,r \\ & \\ & C:\ smooth\ curve\ from\ \left( \,-\,1,\ 1\, \right)\ to\ \left( \,3,\ 2\, \right) \\ \end{aligned}\]