$$-\frac{3}{5}\times(\frac{2}{7}-\frac{3}{2})\times(\frac{1}{5}+\frac{3}{2})\times\frac{-4}{7}$$
$-\frac{867}{1225}\approx -0.707755102$
$$-\frac{3}{5}\left(\frac{4}{14}-\frac{21}{14}\right)\left(\frac{1}{5}+\frac{3}{2}\right)\times \frac{-4}{7}$$
$$-\frac{3}{5}\times \frac{4-21}{14}\left(\frac{1}{5}+\frac{3}{2}\right)\times \frac{-4}{7}$$
$$-\frac{3}{5}\left(-\frac{17}{14}\right)\left(\frac{1}{5}+\frac{3}{2}\right)\times \frac{-4}{7}$$
$$\frac{-3\left(-17\right)}{5\times 14}\left(\frac{1}{5}+\frac{3}{2}\right)\times \frac{-4}{7}$$
$$\frac{51}{70}\left(\frac{1}{5}+\frac{3}{2}\right)\times \frac{-4}{7}$$
$$\frac{51}{70}\left(\frac{2}{10}+\frac{15}{10}\right)\times \frac{-4}{7}$$
$$\frac{51}{70}\times \frac{2+15}{10}\times \frac{-4}{7}$$
$$\frac{51}{70}\times \frac{17}{10}\times \frac{-4}{7}$$
$$\frac{51\times 17}{70\times 10}\times \frac{-4}{7}$$
$$\frac{867}{700}\times \frac{-4}{7}$$
$$\frac{867}{700}\left(-\frac{4}{7}\right)$$
$$\frac{867\left(-4\right)}{700\times 7}$$
$$\frac{-3468}{4900}$$
$$-\frac{867}{1225}$$
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$-\frac{867}{1225} = -0.7077551020408164$
