$\displaystyle\left(-\frac{7}{2}\right)$\displaystyle\left(-\frac{7}{2}\right)

$\displaystyle\left(-\frac{2}{7}\right)$\displaystyle\left(-\frac{2}{7}\right)

$\displaystyle\frac{2}{7}$\displaystyle\frac{2}{7}

$\displaystyle\frac{7}{2}$\displaystyle\frac{7}{2}