2，7，10，4求24点

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1: 2 × (4 × (10 - 7))
2: 2 × 4 ×(10 - 7)
3: (2 × 4) × (10 - 7)
4: (2 - 10) × (4 - 7)
5: (2 × (10 - 7)) × 4
6: 2 × (10 - 7) × 4
7: 2 × ((10 - 7) × 4)
8: (4 - 2) × 7 + 10
9: ((4 - 2) × 7) + 10
10: 4 ÷ 2 × 7 + 10
11: (4 ÷ 2) × 7 + 10
12: (4 ÷ 2 × 7) + 10
13: ((4 ÷ 2) × 7) + 10
14: (4 ÷ (2 ÷ 7)) + 10
15: 4 ÷ (2 ÷ 7) + 10
16: 4 × (2 × (10 - 7))
17: 4 × 2 ×(10 - 7)
18: (4 × 2) × (10 - 7)
19: (4 - 7) × (2 - 10)
20: 4 × 7 ÷ 2 + 10
21: (4 × 7) ÷ 2 + 10
22: (4 × 7 ÷ 2) + 10
23: ((4 × 7) ÷ 2) + 10
24: (4 × (7 ÷ 2)) + 10
25: 4 × (7 ÷ 2) + 10
26: (4 × (10 - 7)) × 2
27: 4 × (10 - 7) × 2

10-7=3 3*2*4=24

(4-2)*7+10=24

(10-7)*2*4=24