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[tex]{2}^{ - 5} - {3}^{ - 4} = \frac{1}{ {2}^{5}} - \frac{1}{ {3}^{4} } = \frac{1}{32} - \frac{1}{81} = 4 \frac{49}{2592}[/tex]
[tex]{8}^{ - \frac{4}{3} } +{27}^{ \frac{1}{3} } = \frac{1}{( {2}^{3}) {}^{ \frac{4}{3} } } + 3 = \frac{1}{ {2}^{4} } + 3 = \frac{1}{6} + 3 = \frac{49}{16} [/tex]
semoga terbantu ya...