1. $\frac{1}{2} + \frac{1}{3} - \frac{1}{4}$
2. $\frac{3}{4} + \frac{1}{2} - \frac{1}{6}$
3. $\frac{5}{6} - \frac{1}{3} + \frac{1}{2}$
4. $\frac{2}{3} + \frac{1}{4} - \frac{1}{5}$
5. $\frac{7}{8} - \frac{1}{2} + \frac{1}{4}$
6. $\frac{3}{5} + \frac{1}{6} - \frac{1}{7}$
7. $\frac{4}{5} - \frac{1}{3} + \frac{1}{6}$
8. $\frac{5}{6} + \frac{1}{4} - \frac{1}{8}$
9. $\frac{2}{3} - \frac{1}{2} + \frac{1}{5}$
10. $\frac{7}{8} + \frac{1}{3} - \frac{1}{4}$
11. $\frac{3}{4} - \frac{1}{5} + \frac{1}{6}$
12. $\frac{5}{6} + \frac{1}{2} - \frac{1}{3}$
13. $\frac{4}{5} + \frac{1}{4} - \frac{1}{7}$
14. $\frac{2}{3} - \frac{1}{5} + \frac{1}{6}$
15. $\frac{7}{8} + \frac{1}{4} - \frac{1}{3}$
16. $\frac{3}{5} - \frac{1}{6} + \frac{1}{2}$
17. $\frac{4}{5} + \frac{1}{3} - \frac{1}{8}$
18. $\frac{2}{3} + \frac{1}{5} - \frac{1}{4}$
19. $\frac{7}{8} - \frac{1}{4} + \frac{1}{6}$
20. $\frac{3}{5} + \frac{1}{2} - \frac{1}{7}$
21. $\frac{4}{5} - \frac{1}{6} + \frac{1}{3}$
22. $\frac{2}{3} + \frac{1}{4} - \frac{1}{5}$
23. $\frac{7}{8} + \frac{1}{6} - \frac{1}{2}$
24. $\frac{3}{5} - \frac{1}{3} + \frac{1}{4}$
25. $\frac{4}{5} + \frac{1}{5} - \frac{1}{6}$
26. $\frac{2}{3} - \frac{1}{4} + \frac{1}{7}$
27. $\frac{7}{8} + \frac{1}{2} - \frac{1}{3}$
28. $\frac{3}{5} + \frac{1}{6} - \frac{1}{8}$
29. $\frac{4}{5} - \frac{1}{2} + \frac{1}{5}$
30. $\frac{2}{3} + \frac{1}{3} - \frac{1}{4}$
31. $\frac{7}{8} - \frac{1}{5} + \frac{1}{6}$
32. $\frac{3}{5} + \frac{1}{4} - \frac{1}{7}$
33. $\frac{4}{5} + \frac{1}{6} - \frac{1}{3}$
34. $\frac{2}{3} - \frac{1}{6} + \frac{1}{5}$
35. $\frac{7}{8} + \frac{1}{3} - \frac{1}{2}$
36. $\frac{3}{5} - \frac{1}{4} + \frac{1}{8}$
37. $\frac{4}{5} + \frac{1}{2} - \frac{1}{6}$
38. $\frac{2}{3} + \frac{1}{5} - \frac