请大家帮忙用几种方法算9 2 2 4算24

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