$\displaystyle -5 \cdot \frac{x}{y}$\displaystyle -5 \cdot \frac{x}{y}

$\displaystyle \left( \frac{x}{y} \right)^{-5}$\displaystyle \left( \frac{x}{y} \right)^{-5}

$\displaystyle \frac{y^5}{x}$\displaystyle \frac{y^5}{x}

$\displaystyle -\left( \frac{x}{y} \right)^{5}$\displaystyle -\left( \frac{x}{y} \right)^{5}