Use Green's Theorem to evaluate the integral ${\displaystyle \underset{C}{\overset{\phantom{}}{}}}(y-x)dx+(2x-y)dy$ where $C$ is the boundary of the region lying ingide the rectangle bounded by $x=-3,x=3,y=-5,y=5,$ and outside the square bounded by $x=-1,x=1,y=-1,$ and $y=1.$

$57$

$56$

So

$18$

$27$