Matematica CBC

$\left [ \left ( \frac{1}{5} \right )^3 \left (\frac{1}{5}  \right )^4\right ]^\frac{2}{7}$
$\left [ \left (\frac{1}{5}  \right )^7\right ]^\frac{2}{7}$
$\left (\frac{1}{5}  \right )^\left ( 7* \frac{2}{7}\right )$
$\left (\frac{1}{5} \right )^2$
$\frac{1}{25}$