$$( \frac { 4 } { 9 } ) ^ { 6 } \times ( \frac { 4 } { 9 } ) ^ { - 4 }$$
$\frac{16}{81}\approx 0.197530864$
$$\left(\frac{4}{9}\right)^{2}$$
$$\frac{16}{81}$$
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$\frac{2 ^ {4}}{3 ^ {4}} = 0.19753086419753085$
