$$(2^{-1}+3^{-1})^{-3}$$
$\frac{216}{125}=1.728$
$$\left(\frac{1}{2}+3^{-1}\right)^{-3}$$
$$\left(\frac{1}{2}+\frac{1}{3}\right)^{-3}$$
$$\left(\frac{5}{6}\right)^{-3}$$
$$\frac{216}{125}$$
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$\frac{2 ^ {3} \cdot 3 ^ {3}}{5 ^ {3}} = 1\frac{91}{125} = 1.728$
