Answer
$\sqrt[3] {a^{2}}+4\sqrt[3] a+4$
Work Step by Step
$(\sqrt[3] a+2)^{2}$
=$(\sqrt[3] a)^{2}+2^{2}+2(\sqrt[3] a)(2)$
=$\sqrt[3] {a^{2}}+4+4\sqrt[3] a$
=$\sqrt[3] {a^{2}}+4\sqrt[3] a+4$
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