$$(\frac{-3}{5})^{-4}(\frac{-2}{5})^{-2}$$
$\frac{15625}{324}\approx 48.225308642$
$$\left(-\frac{3}{5}\right)^{-4}\times \left(\frac{-2}{5}\right)^{-2}$$
$$\frac{625}{81}\times \left(\frac{-2}{5}\right)^{-2}$$
$$\frac{625}{81}\left(-\frac{2}{5}\right)^{-2}$$
$$\frac{625}{81}\times \frac{25}{4}$$
$$\frac{15625}{324}$$
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$\frac{5 ^ {6}}{2 ^ {2} \cdot 3 ^ {4}} = 48\frac{73}{324} = 48.22530864197531$