$$\left. \begin{array} { l } { ( \frac { - 9 } { 13 } ) \times ( \frac { - 7 } { 18 } ) - ( \frac { - 9 } { 13 } ) \times ( \frac { - 5 } { 24 } ) } \\ { ( 4 ) 2 } \end{array} \right.$$
$\frac{1}{8},\ 8$
$$sort(-\frac{9}{13}\times \frac{-7}{18}-\frac{-9}{13}\times \frac{-5}{24},4\times 2)$$
$$sort(-\frac{9}{13}\left(-\frac{7}{18}\right)-\frac{-9}{13}\times \frac{-5}{24},4\times 2)$$
$$sort(\frac{-9\left(-7\right)}{13\times 18}-\frac{-9}{13}\times \frac{-5}{24},4\times 2)$$
$$sort(\frac{63}{234}-\frac{-9}{13}\times \frac{-5}{24},4\times 2)$$
$$sort(\frac{7}{26}-\frac{-9}{13}\times \frac{-5}{24},4\times 2)$$
$$sort(\frac{7}{26}-\left(-\frac{9}{13}\times \frac{-5}{24}\right),4\times 2)$$
$$sort(\frac{7}{26}-\left(-\frac{9}{13}\left(-\frac{5}{24}\right)\right),4\times 2)$$
$$sort(\frac{7}{26}-\frac{-9\left(-5\right)}{13\times 24},4\times 2)$$
$$sort(\frac{7}{26}-\frac{45}{312},4\times 2)$$
$$sort(\frac{7}{26}-\frac{15}{104},4\times 2)$$
$$sort(\frac{28}{104}-\frac{15}{104},4\times 2)$$
$$sort(\frac{28-15}{104},4\times 2)$$
$$sort(\frac{13}{104},4\times 2)$$
$$sort(\frac{1}{8},4\times 2)$$
$$sort(\frac{1}{8},8)$$
$$\frac{1}{8},8$$
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