\( \definecolor{colordef}{RGB}{249,49,84} \definecolor{colorprop}{RGB}{18,102,241} \)
Decompose the function \(f(x)=\dfrac{2}{x^2-1}\) into an outer function \(v\) and an inner function \(u\).
\(u(x)=\)

\(v(x)=\)