arithmetic - $(-32)^{frac{2}{10}}neq(-32)^{frac{1}{5}}$?

Is exponentiation by rational numbers defined only for simple fractions?

$(-32)^{\frac{2}{10}}=\sqrt[10]{(-32)^2}=\sqrt[10]{1024}=\pm2$ (and $8$ other complex roots)

$(-32)^{\frac{1}{5}}=\sqrt[5]{(-32)^1}=\sqrt[5]{-32}=-2$ (and $4$ other complex roots)