Multiply: \ac2x\ot\acx28\ac{2}{x} \ot \ac{x^2}{8}\ac2x\ot\acx28.
\acx4\ac{x}{4}\acx4
\ac4x\ac{4}{x}\ac4x
\ac2x8\ac{2x}{8}\ac2x8
\ac14x\ac{1}{4x}\ac14x