[tex]( \frac{3}{11} - \frac{9}{11} + \frac{5}{11} - \frac{5}{11} + 1 - \frac{7}{11} ) \times ( \frac{15}{17} + \frac{68}{17} - \frac{8}{17} - \frac{51}{17} - \frac{7}{17} ) = [/tex]
[tex] = ( \frac{12}{11} + \frac{11}{11} - \frac{7}{11} ) \times ( \frac{75}{17} - \frac{51}{17} - \frac{7}{17} )[/tex]
[tex] = \frac{16}{11} \times \frac{17}{17} [/tex]
[tex] = > \frac{17}{17} = > 1[/tex]
[tex] = \frac{16}{11} \times 1 = \frac{16}{11} [/tex]
