5599 2258 2259 2289 24点

5, 5, 9, 9的24点答案：
1: 5 × 5 - 9 ÷ 9
2: (5 × 5) - 9 ÷ 9
3: 5 × 5 -(9 ÷ 9)
4: (5 × 5) - (9 ÷ 9)

2, 2, 5, 8的24点答案：

1: (2 × (5 + 8)) - 2
2: 2 × (5 + 8) - 2
3: (2 × (8 + 5)) - 2
4: 2 × (8 + 5) - 2
5: (5 + 8) × 2 - 2
6: ((5 + 8) × 2) - 2
7: (8 + 5) × 2 - 2
8: ((8 + 5) × 2) - 2

2, 2, 5, 9的24点答案：

1: 2 × (5 - 2 + 9)
2: 2 × ((5 - 2) + 9)
3: 2 × (5 - (2 - 9))
4: 2 × (5 + 9 - 2)
5: 2 × ((5 + 9) - 2)
6: 2 × (5 + (9 - 2))
7: 2 × (9 - 2 + 5)
8: 2 × ((9 - 2) + 5)
9: 2 × (9 - (2 - 5))
10: 2 × (9 + 5 - 2)
11: 2 × ((9 + 5) - 2)
12: 2 × (9 + (5 - 2))
13: (5 - 2 + 9) × 2
14: ((5 - 2) + 9) × 2
15: (5 - (2 - 9)) × 2
16: (5 + 9 - 2) × 2
17: ((5 + 9) - 2) × 2
18: (5 + (9 - 2)) × 2
19: (9 - 2 + 5) × 2
20: ((9 - 2) + 5) × 2
21: (9 - (2 - 5)) × 2
22: (9 + 5 - 2) × 2
23: (