$$(-3/7 \times 10/9)+14/15$$
$\frac{16}{35}\approx 0.457142857$
$$\frac{-\frac{3}{7}\times 10}{9}+\frac{14}{15}$$
$$\frac{\frac{-3\times 10}{7}}{9}+\frac{14}{15}$$
$$\frac{\frac{-30}{7}}{9}+\frac{14}{15}$$
$$\frac{-\frac{30}{7}}{9}+\frac{14}{15}$$
$$\frac{-30}{7\times 9}+\frac{14}{15}$$
$$\frac{-30}{63}+\frac{14}{15}$$
$$-\frac{10}{21}+\frac{14}{15}$$
$$-\frac{50}{105}+\frac{98}{105}$$
$$\frac{-50+98}{105}$$
$$\frac{48}{105}$$
$$\frac{16}{35}$$
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$\frac{2 ^ {4}}{5 \cdot 7} = 0.45714285714285713$