$\displaystyle - \frac{\sqrt{3}}{3}$\displaystyle - \frac{\sqrt{3}}{3}

$\displaystyle - \frac{4}{5}$\displaystyle - \frac{4}{5}

$-1$-1

$\displaystyle - \frac{5}{4}$\displaystyle - \frac{5}{4}