$$[ ( - \frac { 3 } { 4 } ) ^ { - 2 } ] ^ { 2 }$$
$\frac{256}{81}\approx 3.160493827$
$$\left(\left(-\frac{3}{4}\right)^{-2}\right)^{2}$$
$$\left(-\frac{3}{4}\right)^{-2\times 2}$$
$$\left(-\frac{3}{4}\right)^{-4}$$
$$\frac{256}{81}$$
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$\frac{2 ^ {8}}{3 ^ {4}} = 3\frac{13}{81} = 3.1604938271604937$
