Simplify: \acxy\ot\acy2x2\ac{x}{y} \ot \ac{y^2}{x^2}\acxy\ot\acy2x2 (assume x,y≠0x, y \neq 0x,y=0).
\acyx\ac{y}{x}\acyx
\acxy\ac{x}{y}\acxy
xyxyxy
1