Question $6$

Evaluate the integral.

${\displaystyle \underset{\phantom{}}{\overset{\phantom{}}{}}}{x}^5\sqrt[\phantom{2}]{x^6+8}dx$

$4(x^6+8{)}^{\frac{3}{2}}+C$

$\frac{2}{3}(x+8{)}^{\frac{3}{2}}+C$

$\frac{1}{3}(x+8{)}^{\frac{3}{2}}+C$

$-\frac{1}{3}(x^6+8{)}^{-\frac{1}{2}}+C$