Simplify: ac2x− ac1y\ ac{2}{x} - \ ac{1}{y} ac2x− ac1y.
ac2y−xxy\ ac{2y - x}{xy} ac2y−xxy
ac1x−y\ ac{1}{x-y} ac1x−y
acy−2xxy\ ac{y - 2x}{xy} acy−2xxy
ac2−1x−y\ ac{2-1}{x-y} ac2−1x−y