#### Answer

a.
$(-5)^{3}$ = -125
b.
$-5^{3}$ = -125
c.
$(-5)^{2}.(\frac{2}{5})^{2}$ = $4$

#### Work Step by Step

a.
$(-5)^{3}$ = $(-5)\times(-5)\times(-5)$ = -125
b.
$-5^{3}$ = -($5\times5\times5$) = -125
c.
$(-5)^{2}.(\frac{2}{5})^{2}$ = $(-5)\times(-5)\times\frac{2}{5}\times\frac{2}{5}$ = $4$