7345四个数字用加减乘除怎样得24?

1: 7 + 3 × 4 + 5
2: (7 + 3 × 4) + 5
3: (7 + (3 × 4)) + 5
4: 7 + (3 × 4) + 5
5: 7 + (3 × 4 + 5)
6: 7 + ((3 × 4) + 5)
7: 7 - 3 + 4 × 5
8: (7 - 3) + 4 × 5
9: 7 - 3 +(4 × 5)
10: (7 - 3) + (4 × 5)
11: 7 - (3 - 4 × 5)
12: 7 - (3 - (4 × 5))
13: 7 - 3 + 5 × 4
14: (7 - 3) + 5 × 4
15: 7 - 3 +(5 × 4)
16: (7 - 3) + (5 × 4)
17: 7 - (3 - 5 × 4)
18: 7 - (3 - (5 × 4))
19: (7 - 3) × 5 + 4
20: ((7 - 3) × 5) + 4
21: 7 + 4 × 3 + 5
22: (7 + 4 × 3) + 5
23: (7 + (4 × 3)) + 5
24: 7 + (4 × 3) + 5
25: 7 + (4 × 3 + 5)
26: 7 + ((4 × 3) + 5)
27: (7 - 4) × (3 + 5)
28: 7 + 4 × 5 - 3
29: (7 + 4 × 5) - 3
30: (7 + (4 × 5)) - 3
31: 7 + (4 × 5) - 3
32: 7 + (4 × 5 - 3)
33: 7 + ((4 × 5) - 3)
34: (7 - 4 + 5) × 3
35: ((7 - 4) + 5) × 3
36: (7 - (4 - 5)) × 3
37: (7 - 4) × (5 + 3)
38: 7 + 5 + 3 × 4
39