5,6,5,3的24点答案：
1:(5 + 5) × 3 - 6
2:((5 + 5) × 3) - 6
3:(5 ÷ 5 + 3) × 6
4:((5 ÷ 5) + 3) × 6
5:6 × (5 ÷ 5 + 3)
6:6 × ((5 ÷ 5) + 3)
7:6 × (3 + 5 ÷ 5)
8:6 × (3 + (5 ÷ 5))
9:(3 + 5 ÷ 5) × 6
10:(3 + (5 ÷ 5)) × 6
11:(3 × (5 + 5)) - 6
12:3 × (5 + 5) - 6