# How do you use the laws of exponents to simplify the expression  (y^-4)^(-3/4)?

${\left({b}^{m}\right)}^{n} = {b}^{m \times n}$
So ${\left({y}^{- 4}\right)}^{- \frac{3}{4}}$
$= {y}^{\left(- 4\right) \times \left(- \frac{3}{4}\right)}$
$= {y}^{3}$