$$-1+\frac{-5}{7}+2+\frac{1}{5}\times\frac{3}{10}$$
$\frac{121}{350}\approx 0.345714286$
$$-1-\frac{5}{7}+2+\frac{1}{5}\times \frac{3}{10}$$
$$-\frac{7}{7}-\frac{5}{7}+2+\frac{1}{5}\times \frac{3}{10}$$
$$\frac{-7-5}{7}+2+\frac{1}{5}\times \frac{3}{10}$$
$$-\frac{12}{7}+2+\frac{1}{5}\times \frac{3}{10}$$
$$-\frac{12}{7}+\frac{14}{7}+\frac{1}{5}\times \frac{3}{10}$$
$$\frac{-12+14}{7}+\frac{1}{5}\times \frac{3}{10}$$
$$\frac{2}{7}+\frac{1}{5}\times \frac{3}{10}$$
$$\frac{2}{7}+\frac{1\times 3}{5\times 10}$$
$$\frac{2}{7}+\frac{3}{50}$$
$$\frac{100}{350}+\frac{21}{350}$$
$$\frac{100+21}{350}$$
$$\frac{121}{350}$$
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$\frac{11 ^ {2}}{2 \cdot 5 ^ {2} \cdot 7} = 0.3457142857142857$
