happy new year

\(\dfrac{x-y}{xy+y^2}-\dfrac{3x+y}{x^2-xy}.\)\(\dfrac{y-x}{x+y}\)

\(A=\left(\dfrac{2xy}{x^2-y^2}+\dfrac{x-y}{2x+2y}\right).\)\(\dfrac{2x}{x+y}+\dfrac{y}{y-x}+\dfrac{2-x}{x-y}\)

\(M=\left[\dfrac{1}{x^2}+\dfrac{1}{y^2}+\dfrac{2}{x-y}.\left(\dfrac{1}{x}-\dfrac{1}{y}\right)\right]:\left(\dfrac{1}{y^2}-\dfrac{1}{x^2}\right)\)