3, 4, 7, 7的24点答案：
1: 3 + 4 × 7 - 7
2: (3 + 4 × 7) - 7
3: (3 + (4 × 7)) - 7
4: 3 + (4 × 7) - 7
5: 3 + (4 × 7 - 7)
6: 3 + ((4 × 7) - 7)
7: 3 - (4 - 7) × 7
8: 3 - ((4 - 7) × 7)
9: 3 + (7 - 4) × 7
10: 3 + ((7 - 4) × 7)
11: 3 + 7 × 4 - 7
12: (3 + 7 × 4) - 7
13: (3 + (7 × 4)) - 7
14: 3 + (7 × 4) - 7
15: 3 + (7 × 4 - 7)
16: 3 + ((7 × 4) - 7)
17: 3 - 7 + 4 × 7
18: (3 - 7) + 4 × 7
19: 3 - 7 +(4 × 7)
20: (3 - 7) + (4 × 7)
21: 3 - (7 - 4 × 7)
22: 3 - (7 - (4 × 7))
23: 3 - (7 × (4 - 7))
24: 3 - 7 ×(4 - 7)
25: 3 × 7 - 4 + 7
26: (3 × 7) - 4 + 7
27: (3 × 7 - 4) + 7
28: ((3 × 7) - 4) + 7
29: 3 × 7 -(4 - 7)
30: (3 × 7) - (4 - 7)
31: 3 + (7 × (7 - 4))
32: 3 + 7 ×(7 - 4)
33: 3 - 7 + 7 × 4
34: (3 - 7) + 7 × 4
35: 3 - 7 +(7 × 4)
36: (3 - 7) + (7 × 4)
37: 3 - (7 - 7 × 4)
38: 3 - (7 - (7 × 4))
39: 3 × 7 + 7 - 4
40: (3 × 7) + 7 - 4
41: (3 × 7 + 7) - 4
42: ((3 × 7) + 7) - 4
43: 3 × 7 +(7 - 4)
44: (3 × 7) + (7 - 4)
45: 4 × 7 + 3 - 7
46: (4 × 7) + 3 - 7
47: (4 × 7 + 3) - 7
48: ((4 × 7) + 3) - 7
49: 4 × 7 +(3 - 7)
50: (4 × 7) + (3 - 7)
51: 4 × 7 - 7 + 3
52: (4 × 7) - 7 + 3
53: (4 × 7 - 7) + 3
54: ((4 × 7) - 7) + 3
55: 4 × 7 -(7 - 3)
56: (4 × 7) - (7 - 3)
57: 7 × 3 - 4 + 7
58: (7 × 3) - 4 + 7
59: (7 × 3 - 4) + 7
60: ((7 × 3) - 4) + 7
61: 7 × 3 -(4 - 7)
62: (7 × 3) - (4 - 7)
63: 7 + 3 × 7 - 4
64: (7 + 3 × 7) - 4
65: (7 + (3 × 7)) - 4
66: 7 + (3 × 7) - 4
67: 7 + (3 × 7 - 4)
68: 7 + ((3 × 7) - 4)
69: (7 - 3) × 7 - 4
70: ((7 - 3) × 7) - 4
71: 7 × 3 + 7 - 4
72: (7 × 3) + 7 - 4
73: (7 × 3 + 7) - 4
74: ((7 × 3) + 7) - 4
75: 7 × 3 +(7 - 4)
76: (7 × 3) + (7 - 4)
77: 7 - 4 + 3 × 7
78: (7 - 4) + 3 × 7
79: 7 - 4 +(3 × 7)
80: (7 - 4) + (3 × 7)
81: 7 - (4 - 3 × 7)
82: 7 - (4 - (3 × 7))
83: 7 × 4 + 3 - 7
84: (7 × 4) + 3 - 7
85: (7 × 4 + 3) - 7
86: ((7 × 4) + 3) - 7
87: 7 × 4 +(3 - 7)
88: (7 × 4) + (3 - 7)
89: 7 - 4 + 7 × 3
90: (7 - 4) + 7 × 3
91: 7 - 4 +(7 × 3)
92: (7 - 4) + (7 × 3)
93: 7 - (4 - 7 × 3)
94: 7 - (4 - (7 × 3))
95: (7 - 4) × 7 + 3
96: ((7 - 4) × 7) + 3
97: 7 × 4 - 7 + 3
98: (7 × 4) - 7 + 3
99: (7 × 4 - 7) + 3
100: ((7 × 4) - 7) + 3
101: 7 × 4 -(7 - 3)
102: (7 × 4) - (7 - 3)
103: 7 + 7 × 3 - 4
104: (7 + 7 × 3) - 4
105: (7 + (7 × 3)) - 4
106: 7 + (7 × 3) - 4
107: 7 + (7 × 3 - 4)
108: 7 + ((7 × 3) - 4)
109: (7 × (7 - 3)) - 4
110: 7 × (7 - 3) - 4
111: (7 × (7 - 4)) + 3
112: 7 × (7 - 4) + 3
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)