3,4,4,4怎么算24点5,7,7,9怎么算24点?2,4,4,9怎么算24点?5,6,6,9怎么算24点?

1:(3 + 4) × 4 - 4
2:((3 + 4) × 4) - 4
3:(4 + 3) × 4 - 4
4:((4 + 3) × 4) - 4
5:(4 × (3 + 4)) - 4
6:4 × (3 + 4) - 4
7:(4 × (4 + 3)) - 4
8:4 × (4 + 3) - 4
1:(5 + 7) × (9 - 7)
2:(7 + 5) × (9 - 7)
3:(9 - 7) × (5 + 7)
4:(9 - 7) × (7 + 5)
1:(4 × (9 - 2)) - 4
2:4 × (9 - 2) - 4
3:(9 - 2) × 4 - 4
4:((9 - 2) × 4) - 4
1:6 × 9 - 5 × 6
2:(6 × 9) - 5 × 6
3:6 × 9 -(5 × 6)
4:(6 × 9) - (5 × 6)
5:6 × 9 - 6 × 5
6:(6 × 9) - 6 × 5
7:6 × 9 -(6 × 5)
8:(6 × 9) - (6 × 5)
9:9 × 6 - 5 × 6
10:(9 × 6) - 5 × 6
11:9 × 6 -(5 × 6)
12:(9 × 6) - (5 × 6)
13:9 × 6 - 6 × 5
14:(9 × 6) - 6 × 5
15:9 × 6 -(6 × 5)
16:(9 × 6) - (6 × 5)

3,4,4,4怎么算24点
（3+4）×4－4
5，7，7，9怎么算24点？
（5+7）×（9-7）
2,4,4,9怎么算24点?
（9-2）×4-4
5,6,6,9怎么算24点?
6×9-6×5