Are the following differential equations exact? (You have only one attempt! Submit all answers at the same time)

(a) Choose Exact Not Exact $\displaystyle \left(1-\frac{3}{y}+x\right)\frac{dy}{dx}+y=\frac{3}{x}-1$.

(b) Choose Exact Not Exact $(5y-2x)y'-2y=0$.

(c) Choose Exact Not Exact $\left( 2y\sin(x)\cos(x)-y+2y^{2}e^{xy^{2}} \right) dx=(x-\sin^{2}(x)-4xye^{xy^{2}})dy$.