$$(\frac{-8}{13})^{-1}+(\frac{14}{5})^{-1}\}\div(\frac{7}{5})^{-1}$$
$-\frac{71}{56}\approx -1.267857143$
$$\left(-\frac{8}{13}\right)^{-1}+\left(\frac{14}{5}\right)^{-1}$$
$$-\frac{13}{8}+\left(\frac{14}{5}\right)^{-1}$$
$$-\frac{13}{8}+\frac{5}{14}$$
$$-\frac{71}{56}$$
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$-\frac{71}{56} = -1\frac{15}{56} = -1.2678571428571428$
