9 6 5 5算24!

1: 4 + 5 + 6 + 9
2: (4 + 5) + 6 + 9
3: (4 + 5 + 6) + 9
4: ((4 + 5) + 6) + 9
5: (4 + (5 + 6)) + 9
6: 4 + (5 + 6) + 9
7: 4 + (5 + 6 + 9)
8: 4 + ((5 + 6) + 9)
9: 4 + (5 + (6 + 9))
10: 4 + 5 +(6 + 9)
11: (4 + 5) + (6 + 9)
12: 4 + 5 + 9 + 6
13: (4 + 5) + 9 + 6
14: (4 + 5 + 9) + 6
15: ((4 + 5) + 9) + 6
16: (4 + (5 + 9)) + 6
17: 4 + (5 + 9) + 6
18: 4 + (5 + 9 + 6)
19: 4 + ((5 + 9) + 6)
20: 4 + (5 + (9 + 6))
21: 4 + 5 +(9 + 6)
22: (4 + 5) + (9 + 6)
23: 4 + 6 + 5 + 9
24: (4 + 6) + 5 + 9
25: (4 + 6 + 5) + 9
26: ((4 + 6) + 5) + 9
27: (4 + (6 + 5)) + 9
28: 4 + (6 + 5) + 9
29: 4 + (6 + 5 + 9)
30: 4 + ((6 + 5) + 9)
31: 4 + (6 + (5 + 9))
32: 4 + 6 +(5 + 9)
33: (4 + 6) + (5 + 9)
34: 4 + 6 + 9 + 5
35: (4 + 6) + 9 + 5
36: (4 + 6 + 9) + 5
37: ((4 + 6) + 9) + 5
38: (4 + (6 + 9)) + 5 <