I need help with number $1.$ In Problems $1-4,$ verify Green's theorem by evaluating both integrals.

$o{\displaystyle \underset{c}{\overset{\phantom{}}{}}}(x-y)dx+xydy={}_R(y+1)dA,$ where $C$ is the triangle with vertices $(0,0),(1,0),(1,3)$

$o{\displaystyle \underset{c}{\overset{\phantom{}}{}}}3x^{2}ydx+(x^2-5y)dy={}_R(2x-3x^2)dA,$ where $C$ is the rectangle with vertices $(-1,0),(1,0),(1,1),(-1,1)$

$-y^{2}dx+x^{2}dy={}_R(2x+2y)dA,$ where $C$ is the circle $x=3cost,y=3sint,0t2$