$$\frac{16}{9}+\frac{5}{-12}+\frac{-7}{18}$$
$\frac{35}{36}\approx 0.972222222$
$$\frac{16}{9}-\frac{5}{12}+\frac{-7}{18}$$
$$\frac{64}{36}-\frac{15}{36}+\frac{-7}{18}$$
$$\frac{64-15}{36}+\frac{-7}{18}$$
$$\frac{49}{36}+\frac{-7}{18}$$
$$\frac{49}{36}-\frac{7}{18}$$
$$\frac{49}{36}-\frac{14}{36}$$
$$\frac{49-14}{36}$$
$$\frac{35}{36}$$
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$\frac{5 \cdot 7}{2 ^ {2} \cdot 3 ^ {2}} = 0.9722222222222222$
