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