3 8 10 12加起来怎样等于24

在线等。急急急急急急急急急急急急急急急急急急急急急急！！！！！！！！！！
谁帮我算一下：
（1）3.8.10.12运算结果等于24
（2）2.3.4.9运算结果等于24
（可以用负数）
对了追加分！！

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

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