$\left( \frac{9}{5} - \frac{4}{6} + \frac{8}{7} \right) - \left( \frac{2}{7} - \frac{11}{5} + \frac{7}{6} \right) = $

$\left( \frac{11}{14} - \frac{9}{8} + \frac{4}{32} \right) \div \left( -\frac{9}{32} \right) = $

$\left( -\frac{5}{18} + \frac{3}{20} - \frac{4}{5} \right) \div \left( -\frac{1}{14} + \frac{1}{20} \right) = $