1:8 × (6 - 4 + 1)
2:8 × ((6 - 4) + 1)
3:8 × (6 - (4 - 1))
4:8 × (6 + 1 - 4)
5:8 × ((6 + 1) - 4)
6:8 × (6 + (1 - 4))
7:(8 - 4) × 6 × 1
8:((8 - 4) × 6) × 1
9:(8 - 4) × (6 × 1)
10:(8 - 4) × 6 ÷ 1
11:((8 - 4) × 6) ÷ 1
12:(8 - 4) × (6 ÷ 1)
13:(8 - 4) × 1 × 6
14:(8 - 4 × 1) × 6
15:((8 - 4) × 1) × 6
16:(8 - (4 × 1)) × 6
17:(8 - 4) × (1 × 6)
18:(8 - 4) ÷ 1 × 6
19:(8 - 4 ÷ 1) × 6
20:((8 - 4) ÷ 1) × 6
21:(8 - (4 ÷ 1)) × 6
22:(8 - 4) ÷ (1 ÷ 6)
23:8 × (1 + 6 - 4)
24:8 × ((1 + 6) - 4)
25:8 × (1 + (6 - 4))
26:(8 - 1 × 4) × 6
27:(8 - (1 × 4)) × 6
28:8 × (1 - 4 + 6)
29:8 × ((1 - 4) + 6)
30:8 × (1 - (4 - 6))
31:(8 × 1 - 4) × 6
32:((8 × 1) - 4) × 6
33:(8 ÷ 1 - 4) × 6
34:((8 ÷ 1) - 4) × 6
35:8 ÷ (1 - 4 ÷ 6)
36:8 ÷ (1 - (4 ÷ 6))
37:(6 × (8 - 4)) × 1
38:6 × (8 - 4) × 1
39:6 × (8 - 4 × 1)
40:6 × ((8 - 4) × 1)
41:6 × (8 - (4 × 1))
42:(6 × (8 - 4)) ÷ 1
43:6 × (8 - 4) ÷ 1
44:6 × (8 - 4 ÷ 1)
45:6 × ((8 - 4) ÷ 1)
46:6 × (8 - (4 ÷ 1))
47:6 × (8 - 1 × 4)
48:6 × (8 - (1 × 4))
49:6 × (8 × 1 - 4)
50:6 × ((8 × 1) - 4)
51:6 × (8 ÷ 1 - 4)
52:6 × ((8 ÷ 1) - 4)
53:(6 - 4 + 1) × 8
54:((6 - 4) + 1) × 8
55:(6 - (4 - 1)) × 8
56:6 × (1 × 8 - 4)
57:6 × ((1 × 8 ) - 4)
58:6 × (1 × (8 - 4))
59:6 × 1 ×(8 - 4)
60:(6 × 1) × (8 - 4)
61:6 ÷ 1 ×(8 - 4)
62:(6 ÷ 1) × (8 - 4)
63:6 ÷ (1 ÷ (8 - 4))
64:(6 + 1 - 4) × 8
65:((6 + 1) - 4) × 8
66:(6 + (1 - 4)) × 8
67:(1 × 8 - 4) × 6
68:((1 × 8 ) - 4) × 6
69:(1 × (8 - 4)) × 6
70:1 × (8 - 4) × 6
71:1 × ((8 - 4) × 6)
72:1 × (6 × (8 - 4))
73:1 × 6 ×(8 - 4)
74:(1 × 6) × (8 - 4)
75:(1 + 6 - 4) × 8
76:((1 + 6) - 4) × 8
77:(1 + (6 - 4)) × 8
78:(1 - 4 + 6) × 8
79:((1 - 4) + 6) × 8
80:(1 - (4 - 6)) × 8