$$-11/13 \times -17/5=-17/5 \times -11/13$$
$\text{true}$
$$13\times \frac{-11}{13}\left(-17\right)=5\times \frac{-17}{5}\left(-11\right)$$
$$13\left(-\frac{11}{13}\right)\left(-17\right)=5\times \frac{-17}{5}\left(-11\right)$$
$$-11\left(-17\right)=5\times \frac{-17}{5}\left(-11\right)$$
$$187=5\times \frac{-17}{5}\left(-11\right)$$
$$187=5\left(-\frac{17}{5}\right)\left(-11\right)$$
$$187=-17\left(-11\right)$$
$$187=187$$
$$\text{true}$$
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