${\left( \frac{ -2{a}^{3}{b}^{4} }{ {a}^{6}{b}^{-4} } \right)}^{3}$
Simplify the expression${\left( \frac{ -2{a}^{3}{b}^{8} }{ {a}^{6} } \right)}^{3}$
Simplify the expression${\left( \frac{ -2{b}^{8} }{ {a}^{3} } \right)}^{3}$
To raise a fraction to a power, raise the numerator and denominator to that power$-\frac{ 8{b}^{24} }{ {a}^{9} }$