$$( - \frac { 4 } { 7 } ) ^ { 3 } \times ( - \frac { 4 } { 7 } ) ^ { 8 } \times ( - \frac { 4 } { 7 } )$$
$\frac{16777216}{13841287201}\approx 0.001212114$
$$\left(-\frac{4}{7}\right)^{11}\left(-\frac{4}{7}\right)$$
$$\left(-\frac{4}{7}\right)^{12}$$
$$\frac{16777216}{13841287201}$$
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$\frac{2 ^ {24}}{7 ^ {12}} = 0.0012121138559127568$
