Answer
$ \color{blue}{\sqrt[3]{(2m+p)^2}}$
Work Step by Step
RECALL:
(1) $a^{m/n}=\sqrt[n]{a^m} = (\sqrt[n]{a})^m$
(2) For $a\gt0$, $\sqrt[n]{a^n} = n$
Use rule (1) above to obtain:
$(2m+p)^{2/3}
\\= \color{blue}{\sqrt[3]{(2m+p)^2}}$