[tex]\begin{gathered}3 \sqrt[3]{4} + \sqrt[3]{4} = \\ \\ 3( {6}^{\frac{2}{3} }) + {6}^{ \frac{2}{3} } + 2( {6}^{ \frac{2}{3} } ) = \\ \\ ( {4}^{ \frac{2}{3} } ) ^{6} = \\ \\ ( - 3 {a}^{3} {b}^{4} ) ^{ - 3} = \\ \\ \sqrt{ \frac{120}{15} } = \end{gathered}[/tex]
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