算24点,有5,5,5,1.(一组)有3,3,7,7,.(一组)

5, 5, 5, 1的24点答案：
1: 5 × (5 - 1 ÷ 5)
2: 5 × (5 - (1 ÷ 5))
3: (5 - 1 ÷ 5) × 5
4: (5 - (1 ÷ 5)) × 5
3, 3, 7, 7的24点答案：
1: (3 + 3 ÷ 7) × 7
2: (3 + (3 ÷ 7)) × 7
3: (3 ÷ 7 + 3) × 7
4: ((3 ÷ 7) + 3) × 7
5: 7 × (3 + 3 ÷ 7)
6: 7 × (3 + (3 ÷ 7))
7: 7 × (3 ÷ 7 + 3)
8: 7 × ((3 ÷ 7) + 3)

5*(5-1/5)
7*(3+3/7)

4，4，10，10
（10*10-4）/4
3,3,8,8
8/(3-3/8)

5*(5-1/5)
7*(3+3/7)