Bentuk sederhana dari (-2a) ³ (2a)-⅔ _______________ = (16a⁴)⅓

[tex] \frac{ {( - 2a)}^{3}. {(2a)}^{ - \frac{2}{3} } }{ { {(16a}^{4}) }^{ \frac{1}{3} } } \\ \frac{ - {2}^{3} {a}^{3}. {2}^{ - \frac{2}{3} } {a}^{ - \frac{2}{3} } }{ {( {2}^{4}) }^{ \frac{1}{3} } {a}^{ \frac{1}{3} } } \\ \frac{ - 8. {2}^{ - \frac{2}{3} }. {a}^{ \frac{7}{3} } }{ {2}^{ \frac{4}{3} }. {a}^{ \frac{1}{3} } } \\ - 8. {2}^{ - 2} {a}^{2} \\ \frac{ - 8}{4} {a}^{2} \\ - 2 {a}^{2} [/tex]