$$(\frac{x^{a}}{x^{-b}})^{a-b}\times(\frac{x^{b}}{x^{-c}})^{b-a}\times(\frac{x^{c}}{x^{-a}})^{c-a}$$
$\left(x^{a+b}\right)^{a-b}\left(x^{a+c}\right)^{c-a}\left(x^{b+c}\right)^{b-a}$
