In Problems $29-40,$ simplify the expressions.

$29.\sqrt[\phantom{2}]{50}$

$30.\sqrt[3]{54}$

$31.\sqrt[3]{2x^3}$

$32.\sqrt[\phantom{2}]{4x}$

$33.\sqrt[\phantom{2}]{25y^6}$

$34.\sqrt[4]{\frac{x}{16}}$

$35.2\sqrt[\phantom{2}]{8}-5\sqrt[\phantom{2}]{27}+\sqrt[3]{128}$

$36.\sqrt[\phantom{2}]{\frac{3}{13}}$

$37.(9z^4{)}^{\frac{1}{2}}$

$38.(27x^6{)}^{\frac{4}{3}}$

$39.(\frac{27t^3}{8}{)}^{\frac{2}{3}}$

$40.(\frac{256}{x^{12}}{)}^{-\frac{3}{4}}$