Tính:
----- Nội dung ảnh -----
5) \( \left( 3 - \frac{1}{4} + \frac{2}{3} \right) - \left( 5 - \frac{1}{3} - \frac{6}{5} \right) - \left( \frac{6}{7} - \frac{7}{3} + \frac{3}{2} \right) \)
6) \( \left( 6 - \frac{2}{3} + \frac{1}{2} \right) - \left( 5 + \frac{5}{3} - \frac{7}{2} \right) - \left( \frac{3}{7} + \frac{5}{2} \right) \)
7) \( \left( \frac{5}{3} + \frac{3}{7} + 9 \right) + \left( 2 - \frac{5}{7} + \frac{2}{3} \right) + \left( \frac{8}{7} - \frac{4}{3} - 10 \right) \)
8) \( \left( \frac{8}{9} - \frac{2}{7} \right) - \left( -6 - \frac{3}{7} + \frac{5}{4} \right) \left( \frac{3}{4} + \frac{2}{4} - \frac{9}{7} \right) \)
5) \( \left( 3 - \frac{1}{4} + \frac{2}{3} \right) - \left( 5 - \frac{1}{3} - \frac{6}{5} \right) - \left( \frac{6}{7} - \frac{7}{3} + \frac{3}{2} \right) \)
6) \( \left( 6 - \frac{2}{3} + \frac{1}{2} \right) - \left( 5 + \frac{5}{3} - \frac{7}{2} \right) - \left( \frac{3}{7} + \frac{5}{2} \right) \)
7) \( \left( \frac{5}{3} + \frac{3}{7} + 9 \right) + \left( 2 - \frac{5}{7} + \frac{2}{3} \right) + \left( \frac{8}{7} - \frac{4}{3} - 10 \right) \)
8) \( \left( \frac{8}{9} - \frac{2}{7} \right) - \left( -6 - \frac{3}{7} + \frac{5}{4} \right) \left( \frac{3}{4} + \frac{2}{4} - \frac{9}{7} \right) \)