Use Green's Theorem to evaluate the line integral. Assume the curve is oriented counterclockwise. (7x+ In 7y)dy - (5y+ arctan x) dx, where C is the boundary of the square with vertices (2, 5), (4, 5), (4, 7), and (2,7). $(7x+ x) dx = (7x+ In 7y)dy- (5y+ arctan x2 (Type an exact answer.)