2 3 5 7 算24点 快快快

简单来说，就两种：
3*5+7+2
3*7+5-2
(5-2)*7+3原理和上一种一样，都是基于21+3的，可视为一种。

1: 2 + 7 + 3 × 5
2: (2 + 7) + 3 × 5
3: 2 + (7 + 3 × 5)
4: 2 + (7 + (3 × 5))
5: 2 + 7 +(3 × 5)
6: (2 + 7) + (3 × 5)
7: 2 + 7 + 5 × 3
8: (2 + 7) + 5 × 3
9: 2 + (7 + 5 × 3)
10: 2 + (7 + (5 × 3))
11: 2 + 7 +(5 × 3)
12: (2 + 7) + (5 × 3)
13: 2 + 3 × 5 + 7
14: (2 + 3 × 5) + 7
15: (2 + (3 × 5)) + 7
16: 2 + (3 × 5) + 7
17: 2 + (3 × 5 + 7)
18: 2 + ((3 × 5) + 7)
19: 2 + 5 × 3 + 7
20: (2 + 5 × 3) + 7
21: (2 + (5 × 3)) + 7
22: 2 + (5 × 3) + 7
23: 2 + (5 × 3 + 7)
24: 2 + ((5 × 3) + 7)
25: 7 + 2 + 3 × 5
26: (7 + 2) + 3 × 5
27: 7 + (2 + 3 × 5)
28: 7 + (2 + (3 × 5))
29: 7 + 2 +(3 × 5)
30: (7 + 2) + (3 × 5)
31: 7 + 2 + 5 × 3
32: (7 + 2) + 5 × 3
33: 7 + (2 + 5 × 3)
34: 7 + (2 + (5 × 3))
35: 7 + 2 +(5 × 3)
36: (7 + 2) + (5 × 3)
37: 7 × 3 - 2 + 5
38: (7 × 3) - 2 + 5
39: (7 × 3 - 2) + 5
40: ((7 × 3) - 2) + 5
41: 7 × 3 -(2 - 5)
42: (7 × 3) - (2 - 5)
43: 7 + 3 × 5 + 2
44: (7 + 3 × 5) + 2
45: (7 + (3 × 5)) + 2
46: 7 + (3 × 5) + 2
47: 7 + (3 × 5 + 2)
48: 7 + ((3 × 5) + 2)
49: 7 × 3 + 5 - 2
50: (7 × 3) + 5 - 2
51: (7 × 3 + 5) - 2
52: ((7 × 3) + 5) - 2
53: 7 × 3 +(5 - 2)
54: (7 × 3) + (5 - 2)
55: (7 × (5 - 2)) + 3
56: 7 × (5 - 2) + 3
57: 7 + 5 × 3 + 2
58: (7 + 5 × 3) + 2
59: (7 + (5 × 3)) + 2
60: 7 + (5 × 3) + 2
61: 7 + (5 × 3 + 2)
62: 7 + ((5 × 3) + 2)
63: 3 - (2 - 5) × 7
64: 3 - ((2 - 5) × 7)
65: 3 - (7 × (2 - 5))
66: 3 - 7 ×(2 - 5)
67: 3 × 7 - 2 + 5
68: (3 × 7) - 2 + 5
69: (3 × 7 - 2) + 5
70: ((3 × 7) - 2) + 5
71: 3 × 7 -(2 - 5)
72: (3 × 7) - (2 - 5)
73: 3 + (7 × (5 - 2))
74: 3 + 7 ×(5 - 2)
75: 3 × 7 + 5 - 2
76: (3 × 7) + 5 - 2
77: (3 × 7 + 5) - 2
78: ((3 × 7) + 5) - 2
79: 3 × 7 +(5 - 2)
80: (3 × 7) + (5 - 2)
81: 3 + (5 - 2) × 7
82: 3 + ((5 - 2) × 7)
83: 3 × 5 + 2 + 7
84: (3 × 5) + 2 + 7
85: (3 × 5 + 2) + 7
86: ((3 × 5) + 2) + 7
87: 3 × 5 +(2 + 7)
88: (3 × 5) + (2 + 7)
89: 3 × 5 + 7 + 2
90: (3 × 5) + 7 + 2
91: (3 × 5 + 7) + 2
92: ((3 × 5) + 7) + 2
93: 3 × 5 +(7 + 2)
94: (3 × 5) + (7 + 2)
95: 5 - 2 + 7 × 3
96: (5 - 2) + 7 × 3
97: 5 - 2 +(7 × 3)
98: (5 - 2) + (7 × 3)
99: 5 - (2 - 7 × 3)
100: 5 - (2 - (7 × 3))
101: (5 - 2) × 7 + 3
102: ((5 - 2) × 7) + 3
103: 5 - 2 + 3 × 7
104: (5 - 2) + 3 × 7
105: 5 - 2 +(3 × 7)
106: (5 - 2) + (3 × 7)
107: 5 - (2 - 3 × 7)
108: 5 - (2 - (3 × 7))
109: 5 + 7 × 3 - 2
110: (5 + 7 × 3) - 2
111: (5 + (7 × 3)) - 2
112: 5 + (7 × 3) - 2
113: 5 + (7 × 3 - 2)
114: 5 + ((7 × 3) - 2)
115: 5 × 3 + 2 + 7
116: (5 × 3) + 2 + 7
117: (5 × 3 + 2) + 7
118: ((5 × 3) + 2) + 7
119: 5 × 3 +(2 + 7)
120: (5 × 3) + (2 + 7)
121: 5 + 3 × 7 - 2
122: (5 + 3 × 7) - 2
123: (5 + (3 × 7)) - 2
124: 5 + (3 × 7) - 2
125: 5 + (3 × 7 - 2)
126: 5 + ((3 × 7) - 2)
127: 5 × 3 + 7 + 2
128: (5 × 3) + 7 + 2
129: (5 × 3 + 7) + 2
130: ((5 × 3) + 7) + 2
131: 5 × 3 +(7 + 2)
132: (5 × 3) + (7 + 2)

（-2+5）+3*7=24和3x7+5-2 、3乘5加2加7

3*5+2+7=24

3*7+5-2=24