$$-2\frac{1}{7}+1\frac{-3}{5}+\frac{5}{7}$$
$-\frac{71}{35}\approx -2.028571429$
$$-\frac{14+1}{7}+1\times \frac{-3}{5}+\frac{5}{7}$$
$$-\frac{15}{7}+1\times \frac{-3}{5}+\frac{5}{7}$$
$$-\frac{15}{7}+1\left(-\frac{3}{5}\right)+\frac{5}{7}$$
$$-\frac{15}{7}-\frac{3}{5}+\frac{5}{7}$$
$$-\frac{75}{35}-\frac{21}{35}+\frac{5}{7}$$
$$\frac{-75-21}{35}+\frac{5}{7}$$
$$-\frac{96}{35}+\frac{5}{7}$$
$$-\frac{96}{35}+\frac{25}{35}$$
$$\frac{-96+25}{35}$$
$$-\frac{71}{35}$$
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$-\frac{71}{35} = -2\frac{1}{35} = -2.0285714285714285$
