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