I need help writing the exponential form of an expression

The expression is written as:
[tex](7x)^{\frac{4}{3}}[/tex]Explanation:The given expression is written as follows:
[tex]\begin{gathered} (\sqrt[3]{7x})^4=((7x)^{\frac{1}{3}})^4 \\ \\ =(7x)^{\frac{4}{3}} \end{gathered}[/tex]