算24点，求有多少种算法

1: 6 × (8 ÷ (9 - 7))
2: 6 × 8 ÷(9 - 7)
3: (6 × 8) ÷ (9 - 7)
4: (6 ÷ (9 - 7)) × 8
5: 6 ÷ (9 - 7) × 8
6: 6 ÷ ((9 - 7) ÷ 8)
7: 8 × (6 ÷ (9 - 7))
8: 8 × 6 ÷(9 - 7)
9: (8 × 6) ÷ (9 - 7)
10: (8 ÷ (9 - 7)) × 6
11: 8 ÷ (9 - 7) × 6
12: 8 ÷ ((9 - 7) ÷ 6)

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