5 8 9 9，求24点

1: (5 + 10) / 5 × 8
2: ((5 + 10) / 5) × 8
3: (5 + 10) / (5 / 8)
4: (5 - 10 / 5) × 8
5: (5 - (10 / 5)) × 8
6: (5 + 10) × 8 / 5
7: ((5 + 10) × 8) / 5
8: (5 + 10) × (8 / 5)
9: 8 / 5 ×(5 + 10)
10: (8 / 5) × (5 + 10)
11: 8 / (5 / (5 + 10))
12: (8 × (5 + 10)) / 5
13: 8 × (5 + 10) / 5
14: 8 × ((5 + 10) / 5)
15: 8 × (5 - 10 / 5)
16: 8 × (5 - (10 / 5))
17: 8 / 5 ×(10 + 5)
18: (8 / 5) × (10 + 5)
19: 8 / (5 / (10 + 5))
20: (8 × (10 + 5)) / 5
21: 8 × (10 + 5) / 5
22: 8 × ((10 + 5) / 5)
23: (10 + 5) / 5 × 8
24: ((10 + 5) / 5) × 8
25: (10 + 5) / (5 / 8)
26: (10 + 5) × 8 / 5
27: ((10 + 5) × 8) / 5
28: (10 + 5) × (8 / 5)

(5 + 10) / 5 × 8

说得是什么啊 ！？