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4, 2, 7, 11的24点答案：
1: 4 + 2 + 7 + 11
2: (4 + 2) + 7 + 11
3: (4 + 2 + 7) + 11
4: ((4 + 2) + 7) + 11
5: (4 + (2 + 7)) + 11
6: 4 + (2 + 7) + 11
7: 4 + (2 + 7 + 11)
8: 4 + ((2 + 7) + 11)
9: 4 + (2 + (7 + 11))
10: 4 + 2 +(7 + 11)
11: (4 + 2) + (7 + 11)
12: 4 × (2 - 7 + 11)
13: 4 × ((2 - 7) + 11)
14: 4 × (2 - (7 - 11))
15: 4 + 2 + 11 + 7
16: (4 + 2) + 11 + 7
17: (4 + 2 + 11) + 7
18: ((4 + 2) + 11) + 7
19: (4 + (2 + 11)) + 7
20: 4 + (2 + 11) + 7
21: 4 + (2 + 11 + 7)
22: 4 + ((2 + 11) + 7)
23: 4 + (2 + (11 + 7))
24: 4 + 2 +(11 + 7)
25: (4 + 2) + (11 + 7)
26: (4 + 2) × (11 - 7)
27: 4 × (2 + 11 - 7)
28: 4 × ((2 + 11) - 7)
29: 4 × (2 + (11 - 7))
30: 4 + 7 + 2 + 11
31: (4 + 7) + 2 + 11
32: (4 + 7 + 2) + 11
33: ((4 + 7) + 2) + 11
34: (4 + (7 + 2)) + 11
35: 4 + (7 + 2) + 11
36: 4 + (7 + 2 + 11)
37: 4 + ((7 + 2) + 11)
38: 4 + (7 + (2 + 11))
39: 4 + 7 +(2 + 11)
40: (4 + 7) + (2 + 11)
41: 4 + 7 + 11 + 2
42: (4 + 7) + 11 + 2
43: (4 + 7 + 11) + 2
44: ((4 + 7) + 11) + 2
45: (4 + (7 + 11)) + 2
46: 4 + (7 + 11) + 2
47: 4 + (7 + 11 + 2)
48: 4 + ((7 + 11) + 2)
49: 4 + (7 + (11 + 2))
50: 4 + 7 +(11 + 2)
51: (4 + 7) + (11 + 2)
52: 4 + 11 + 2 + 7
53: (4 + 11) + 2 + 7
54: (4 + 11 + 2) + 7
55: ((4 + 11) + 2) + 7
56: (4 + (11 + 2)) + 7
57: 4 + (11 + 2) + 7
58: 4 + (11 + 2 + 7)
59: 4 + ((11 + 2) + 7)
60: 4 + (11 + (2 + 7))
61: 4 + 11 +(2 + 7)
62: (4 + 11) + (2 + 7)
63: 4 × (11 + 2 - 7)
64: 4 × ((11 + 2) - 7)
65: 4 × (11 + (2 - 7))
66: 4 + 11 + 7 + 2
67: (4 + 11) + 7 + 2
68: (4 + 11 + 7) + 2
69: ((4 + 11) + 7) + 2
70: (4 + (11 + 7)) + 2
71: 4 + (11 + 7) + 2
72: 4 + (11 + 7 + 2)
73: 4 + ((11 + 7) + 2)
74: 4 + (11 + (7 + 2))
75: 4 + 11 +(7 + 2)
76: (4 + 11) + (7 + 2)
77: 4 × (11 - 7 + 2)
78: 4 × ((11 - 7) + 2)
79: 4 × (11 - (7 - 2))
80: 2 + 4 + 7 + 11
81: (2 + 4) + 7 + 11
82: (2 + 4 + 7) + 11
83: ((2 + 4) + 7) + 11
84: (2 + (4 + 7)) + 11
85: 2 + (4 + 7) + 11
86: 2 + (4 + 7 + 11)
87: 2 + ((4 + 7) + 11)
88: 2 + (4 + (7 + 11))
89: 2 + 4 +(7 + 11)
90: (2 + 4) + (7 + 11)
91: 2 + 4 + 11 + 7
92: (2 + 4) + 11 + 7
93: (2 + 4 + 11) + 7
94: ((2 + 4) + 11) + 7
95: (2 + (4 + 11)) + 7
96: 2 + (4 + 11) + 7
97: 2 + (4 + 11 + 7)
98: 2 + ((4 + 11) + 7)
99: 2 + (4 + (11 + 7))
100: 2 + 4 +(11 + 7)
101: (2 + 4) + (11 + 7)
102: (2 + 4) × (11 - 7)
103: 2 + 7 + 4 + 11
104: (2 + 7) + 4 + 11
105: (2 + 7 + 4) + 11
106: ((2 + 7) + 4) + 11
107: (2 + (7 + 4)) + 11
108: 2 + (7 + 4) + 11
109: 2 + (7 + 4 + 11)
110: 2 + ((7 + 4) + 11)
111: 2 + (7 + (4 + 11))
112: 2 + 7 +(4 + 11)
113: (2 + 7) + (4 + 11)
114: 2 + 7 + 11 + 4
115: (2 + 7) + 11 + 4
116: (2 + 7 + 11) + 4
117: ((2 + 7) + 11) + 4
118: (2 + (7 + 11)) + 4
119: 2 + (7 + 11) + 4
120: 2 + (7 + 11 + 4)
121: 2 + ((7 + 11) + 4)
122: 2 + (7 + (11 + 4))
123: 2 + 7 +(11 + 4)
124: (2 + 7) + (11 + 4)
125: (2 - 7 + 11) × 4
126: ((2 - 7) + 11) × 4
127: (2 - (7 - 11)) × 4
128: 2 + 11 + 4 + 7
129: (2 + 11) + 4 + 7
130: (2 + 11 + 4) + 7
131: ((2 + 11) + 4) + 7
132: (2 + (11 + 4)) + 7
133: 2 + (11 + 4) + 7
134: 2 + (11 + 4 + 7)
135: 2 + ((11 + 4) + 7)
136: 2 + (11 + (4 + 7))
137: 2 + 11 +(4 + 7)
138: (2 + 11) + (4 + 7)
139: 2 + 11 + 7 + 4
140: (2 + 11) + 7 + 4
141: (2 + 11 + 7) + 4
142: ((2 + 11) + 7) + 4
143: (2 + (11 + 7)) + 4
144: 2 + (11 + 7) + 4
145: 2 + (11 + 7 + 4)
146: 2 + ((11 + 7) + 4)
147: 2 + (11 + (7 + 4))
148: 2 + 11 +(7 + 4)
149: (2 + 11) + (7 + 4)
150: (2 + 11 - 7) × 4
151: ((2 + 11) - 7) × 4
152: (2 + (11 - 7)) × 4
153: 7 + 4 + 2 + 11
154: (7 + 4) + 2 + 11
155: (7 + 4 + 2) + 11
156: ((7 + 4) + 2) + 11
157: (7 + (4 + 2)) + 11
158: 7 + (4 + 2) + 11
159: 7 + (4 + 2 + 11)
160: 7 + ((4 + 2) + 11)
161: 7 + (4 + (2 + 11))
162: 7 + 4 +(2 + 11)
163: (7 + 4) + (2 + 11)
164: 7 + 4 + 11 + 2
165: (7 + 4) + 11 + 2
166: (7 + 4 + 11) + 2
167: ((7 + 4) + 11) + 2
168: (7 + (4 + 11)) + 2
169: 7 + (4 + 11) + 2
170: 7 + (4 + 11 + 2)
171: 7 + ((4 + 11) + 2)
172: 7 + (4 + (11 + 2))
173: 7 + 4 +(11 + 2)
174: (7 + 4) + (11 + 2)
175: 7 + 2 + 4 + 11
176: (7 + 2) + 4 + 11
177: (7 + 2 + 4) + 11
178: ((7 + 2) + 4) + 11
179: (7 + (2 + 4)) + 11
180: 7 + (2 + 4) + 11
181: 7 + (2 + 4 + 11)
182: 7 + ((2 + 4) + 11)
183: 7 + (2 + (4 + 11))
184: 7 + 2 +(4 + 11)
185: (7 + 2) + (4 + 11)
186: 7 + 2 + 11 + 4
187: (7 + 2) + 11 + 4
188: (7 + 2 + 11) + 4
189: ((7 + 2) + 11) + 4
190: (7 + (2 + 11)) + 4
191: 7 + (2 + 11) + 4
192: 7 + (2 + 11 + 4)
193: 7 + ((2 + 11) + 4)
194: 7 + (2 + (11 + 4))
195: 7 + 2 +(11 + 4)
196: (7 + 2) + (11 + 4)
197: 7 + 11 + 4 + 2
198: (7 + 11) + 4 + 2
199: (7 + 11 + 4) + 2
200: ((7 + 11) + 4) + 2
201: (7 + (11 + 4)) + 2
202: 7 + (11 + 4) + 2
203: 7 + (11 + 4 + 2)
204: 7 + ((11 + 4) + 2)
205: 7 + (11 + (4 + 2))
206: 7 + 11 +(4 + 2)
207: (7 + 11) + (4 + 2)
208: 7 + 11 + 2 + 4
209: (7 + 11) + 2 + 4
210: (7 + 11 + 2) + 4
211: ((7 + 11) + 2) + 4
212: (7 + (11 + 2)) + 4
213: 7 + (11 + 2) + 4
214: 7 + (11 + 2 + 4)
215: 7 + ((11 + 2) + 4)
216: 7 + (11 + (2 + 4))
217: 7 + 11 +(2 + 4)
218: (7 + 11) + (2 + 4)
219: 11 + 4 + 2 + 7
220: (11 + 4) + 2 + 7
221: (11 + 4 + 2) + 7
222: ((11 + 4) + 2) + 7
223: (11 + (4 + 2)) + 7
224: 11 + (4 + 2) + 7
225: 11 + (4 + 2 + 7)
226: 11 + ((4 + 2) + 7)
227: 11 + (4 + (2 + 7))
228: 11 + 4 +(2 + 7)
229: (11 + 4) + (2 + 7)
230: 11 + 4 + 7 + 2
231: (11 + 4) + 7 + 2
232: (11 + 4 + 7) + 2
233: ((11 + 4) + 7) + 2
234: (11 + (4 + 7)) + 2
235: 11 + (4 + 7) + 2
236: 11 + (4 + 7 + 2)
237: 11 + ((4 + 7) + 2)
238: 11 + (4 + (7 + 2))
239: 11 + 4 +(7 + 2)
240: (11 + 4) + (7 + 2)
241: 11 + 2 + 4 + 7
242: (11 + 2) + 4 + 7
243: (11 + 2 + 4) + 7
244: ((11 + 2) + 4) + 7
245: (11 + (2 + 4)) + 7
246: 11 + (2 + 4) + 7
247: 11 + (2 + 4 + 7)
248: 11 + ((2 + 4) + 7)
249: 11 + (2 + (4 + 7))
250: 11 + 2 +(4 + 7)
251: (11 + 2) + (4 + 7)
252: 11 + 2 + 7 + 4
253: (11 + 2) + 7 + 4
254: (11 + 2 + 7) + 4
255: ((11 + 2) + 7) + 4
256: (11 + (2 + 7)) + 4
257: 11 + (2 + 7) + 4
258: 11 + (2 + 7 + 4)
259: 11 + ((2 + 7) + 4)
260: 11 + (2 + (7 + 4))
261: 11 + 2 +(7 + 4)
262: (11 + 2) + (7 + 4)
263: (11 + 2 - 7) × 4
264: ((11 + 2) - 7) × 4
265: (11 + (2 - 7)) × 4
266: 11 + 7 + 4 + 2
267: (11 + 7) + 4 + 2
268: (11 + 7 + 4) + 2
269: ((11 + 7) + 4) + 2
270: (11 + (7 + 4)) + 2
271: 11 + (7 + 4) + 2
272: 11 + (7 + 4 + 2)
273: 11 + ((7 + 4) + 2)
274: 11 + (7 + (4 + 2))
275: 11 + 7 +(4 + 2)
276: (11 + 7) + (4 + 2)
277: (11 - 7) × (4 + 2)
278: 11 + 7 + 2 + 4
279: (11 + 7) + 2 + 4
280: (11 + 7 + 2) + 4
281: ((11 + 7) + 2) + 4
282: (11 + (7 + 2)) + 4
283: 11 + (7 + 2) + 4
284: 11 + (7 + 2 + 4)
285: 11 + ((7 + 2) + 4)
286: 11 + (7 + (2 + 4))
287: 11 + 7 +(2 + 4)
288: (11 + 7) + (2 + 4)
289: (11 - 7 + 2) × 4
290: ((11 - 7) + 2) × 4
291: (11 - (7 - 2)) × 4
292: (11 - 7) × (2 + 4)
1: 4 + 2 + 7 + 11
2: (4 + 2) + 7 + 11
3: (4 + 2 + 7) + 11
4: ((4 + 2) + 7) + 11
5: (4 + (2 + 7)) + 11
6: 4 + (2 + 7) + 11
7: 4 + (2 + 7 + 11)
8: 4 + ((2 + 7) + 11)
9: 4 + (2 + (7 + 11))
10: 4 + 2 +(7 + 11)
11: (4 + 2) + (7 + 11)
12: 4 × (2 - 7 + 11)
13: 4 × ((2 - 7) + 11)
14: 4 × (2 - (7 - 11))
15: 4 + 2 + 11 + 7
16: (4 + 2) + 11 + 7
17: (4 + 2 + 11) + 7
18: ((4 + 2) + 11) + 7
19: (4 + (2 + 11)) + 7
20: 4 + (2 + 11) + 7
21: 4 + (2 + 11 + 7)
22: 4 + ((2 + 11) + 7)
23: 4 + (2 + (11 + 7))
24: 4 + 2 +(11 + 7)
25: (4 + 2) + (11 + 7)
26: (4 + 2) × (11 - 7)
27: 4 × (2 + 11 - 7)
28: 4 × ((2 + 11) - 7)
29: 4 × (2 + (11 - 7))
30: 4 + 7 + 2 + 11
31: (4 + 7) + 2 + 11
32: (4 + 7 + 2) + 11
33: ((4 + 7) + 2) + 11
34: (4 + (7 + 2)) + 11
35: 4 + (7 + 2) + 11
36: 4 + (7 + 2 + 11)
37: 4 + ((7 + 2) + 11)
38: 4 + (7 + (2 + 11))
39: 4 + 7 +(2 + 11)
40: (4 + 7) + (2 + 11)
41: 4 + 7 + 11 + 2
42: (4 + 7) + 11 + 2
43: (4 + 7 + 11) + 2
44: ((4 + 7) + 11) + 2
45: (4 + (7 + 11)) + 2
46: 4 + (7 + 11) + 2
47: 4 + (7 + 11 + 2)
48: 4 + ((7 + 11) + 2)
49: 4 + (7 + (11 + 2))
50: 4 + 7 +(11 + 2)
51: (4 + 7) + (11 + 2)
52: 4 + 11 + 2 + 7
53: (4 + 11) + 2 + 7
54: (4 + 11 + 2) + 7
55: ((4 + 11) + 2) + 7
56: (4 + (11 + 2)) + 7
57: 4 + (11 + 2) + 7
58: 4 + (11 + 2 + 7)
59: 4 + ((11 + 2) + 7)
60: 4 + (11 + (2 + 7))
61: 4 + 11 +(2 + 7)
62: (4 + 11) + (2 + 7)
63: 4 × (11 + 2 - 7)
64: 4 × ((11 + 2) - 7)
65: 4 × (11 + (2 - 7))
66: 4 + 11 + 7 + 2
67: (4 + 11) + 7 + 2
68: (4 + 11 + 7) + 2
69: ((4 + 11) + 7) + 2
70: (4 + (11 + 7)) + 2
71: 4 + (11 + 7) + 2
72: 4 + (11 + 7 + 2)
73: 4 + ((11 + 7) + 2)
74: 4 + (11 + (7 + 2))
75: 4 + 11 +(7 + 2)
76: (4 + 11) + (7 + 2)
77: 4 × (11 - 7 + 2)
78: 4 × ((11 - 7) + 2)
79: 4 × (11 - (7 - 2))
80: 2 + 4 + 7 + 11
81: (2 + 4) + 7 + 11
82: (2 + 4 + 7) + 11
83: ((2 + 4) + 7) + 11
84: (2 + (4 + 7)) + 11
85: 2 + (4 + 7) + 11
86: 2 + (4 + 7 + 11)
87: 2 + ((4 + 7) + 11)
88: 2 + (4 + (7 + 11))
89: 2 + 4 +(7 + 11)
90: (2 + 4) + (7 + 11)
91: 2 + 4 + 11 + 7
92: (2 + 4) + 11 + 7
93: (2 + 4 + 11) + 7
94: ((2 + 4) + 11) + 7
95: (2 + (4 + 11)) + 7
96: 2 + (4 + 11) + 7
97: 2 + (4 + 11 + 7)
98: 2 + ((4 + 11) + 7)
99: 2 + (4 + (11 + 7))
100: 2 + 4 +(11 + 7)
101: (2 + 4) + (11 + 7)
102: (2 + 4) × (11 - 7)
103: 2 + 7 + 4 + 11
104: (2 + 7) + 4 + 11
105: (2 + 7 + 4) + 11
106: ((2 + 7) + 4) + 11
107: (2 + (7 + 4)) + 11
108: 2 + (7 + 4) + 11
109: 2 + (7 + 4 + 11)
110: 2 + ((7 + 4) + 11)
111: 2 + (7 + (4 + 11))
112: 2 + 7 +(4 + 11)
113: (2 + 7) + (4 + 11)
114: 2 + 7 + 11 + 4
115: (2 + 7) + 11 + 4
116: (2 + 7 + 11) + 4
117: ((2 + 7) + 11) + 4
118: (2 + (7 + 11)) + 4
119: 2 + (7 + 11) + 4
120: 2 + (7 + 11 + 4)
121: 2 + ((7 + 11) + 4)
122: 2 + (7 + (11 + 4))
123: 2 + 7 +(11 + 4)
124: (2 + 7) + (11 + 4)
125: (2 - 7 + 11) × 4
126: ((2 - 7) + 11) × 4
127: (2 - (7 - 11)) × 4
128: 2 + 11 + 4 + 7
129: (2 + 11) + 4 + 7
130: (2 + 11 + 4) + 7
131: ((2 + 11) + 4) + 7
132: (2 + (11 + 4)) + 7
133: 2 + (11 + 4) + 7
134: 2 + (11 + 4 + 7)
135: 2 + ((11 + 4) + 7)
136: 2 + (11 + (4 + 7))
137: 2 + 11 +(4 + 7)
138: (2 + 11) + (4 + 7)
139: 2 + 11 + 7 + 4
140: (2 + 11) + 7 + 4
141: (2 + 11 + 7) + 4
142: ((2 + 11) + 7) + 4
143: (2 + (11 + 7)) + 4
144: 2 + (11 + 7) + 4
145: 2 + (11 + 7 + 4)
146: 2 + ((11 + 7) + 4)
147: 2 + (11 + (7 + 4))
148: 2 + 11 +(7 + 4)
149: (2 + 11) + (7 + 4)
150: (2 + 11 - 7) × 4
151: ((2 + 11) - 7) × 4
152: (2 + (11 - 7)) × 4
153: 7 + 4 + 2 + 11
154: (7 + 4) + 2 + 11
155: (7 + 4 + 2) + 11
156: ((7 + 4) + 2) + 11
157: (7 + (4 + 2)) + 11
158: 7 + (4 + 2) + 11
159: 7 + (4 + 2 + 11)
160: 7 + ((4 + 2) + 11)
161: 7 + (4 + (2 + 11))
162: 7 + 4 +(2 + 11)
163: (7 + 4) + (2 + 11)
164: 7 + 4 + 11 + 2
165: (7 + 4) + 11 + 2
166: (7 + 4 + 11) + 2
167: ((7 + 4) + 11) + 2
168: (7 + (4 + 11)) + 2
169: 7 + (4 + 11) + 2
170: 7 + (4 + 11 + 2)
171: 7 + ((4 + 11) + 2)
172: 7 + (4 + (11 + 2))
173: 7 + 4 +(11 + 2)
174: (7 + 4) + (11 + 2)
175: 7 + 2 + 4 + 11
176: (7 + 2) + 4 + 11
177: (7 + 2 + 4) + 11
178: ((7 + 2) + 4) + 11
179: (7 + (2 + 4)) + 11
180: 7 + (2 + 4) + 11
181: 7 + (2 + 4 + 11)
182: 7 + ((2 + 4) + 11)
183: 7 + (2 + (4 + 11))
184: 7 + 2 +(4 + 11)
185: (7 + 2) + (4 + 11)
186: 7 + 2 + 11 + 4
187: (7 + 2) + 11 + 4
188: (7 + 2 + 11) + 4
189: ((7 + 2) + 11) + 4
190: (7 + (2 + 11)) + 4
191: 7 + (2 + 11) + 4
192: 7 + (2 + 11 + 4)
193: 7 + ((2 + 11) + 4)
194: 7 + (2 + (11 + 4))
195: 7 + 2 +(11 + 4)
196: (7 + 2) + (11 + 4)
197: 7 + 11 + 4 + 2
198: (7 + 11) + 4 + 2
199: (7 + 11 + 4) + 2
200: ((7 + 11) + 4) + 2
201: (7 + (11 + 4)) + 2
202: 7 + (11 + 4) + 2
203: 7 + (11 + 4 + 2)
204: 7 + ((11 + 4) + 2)
205: 7 + (11 + (4 + 2))
206: 7 + 11 +(4 + 2)
207: (7 + 11) + (4 + 2)
208: 7 + 11 + 2 + 4
209: (7 + 11) + 2 + 4
210: (7 + 11 + 2) + 4
211: ((7 + 11) + 2) + 4
212: (7 + (11 + 2)) + 4
213: 7 + (11 + 2) + 4
214: 7 + (11 + 2 + 4)
215: 7 + ((11 + 2) + 4)
216: 7 + (11 + (2 + 4))
217: 7 + 11 +(2 + 4)
218: (7 + 11) + (2 + 4)
219: 11 + 4 + 2 + 7
220: (11 + 4) + 2 + 7
221: (11 + 4 + 2) + 7
222: ((11 + 4) + 2) + 7
223: (11 + (4 + 2)) + 7
224: 11 + (4 + 2) + 7
225: 11 + (4 + 2 + 7)
226: 11 + ((4 + 2) + 7)
227: 11 + (4 + (2 + 7))
228: 11 + 4 +(2 + 7)
229: (11 + 4) + (2 + 7)
230: 11 + 4 + 7 + 2
231: (11 + 4) + 7 + 2
232: (11 + 4 + 7) + 2
233: ((11 + 4) + 7) + 2
234: (11 + (4 + 7)) + 2
235: 11 + (4 + 7) + 2
236: 11 + (4 + 7 + 2)
237: 11 + ((4 + 7) + 2)
238: 11 + (4 + (7 + 2))
239: 11 + 4 +(7 + 2)
240: (11 + 4) + (7 + 2)
241: 11 + 2 + 4 + 7
242: (11 + 2) + 4 + 7
243: (11 + 2 + 4) + 7
244: ((11 + 2) + 4) + 7
245: (11 + (2 + 4)) + 7
246: 11 + (2 + 4) + 7
247: 11 + (2 + 4 + 7)
248: 11 + ((2 + 4) + 7)
249: 11 + (2 + (4 + 7))
250: 11 + 2 +(4 + 7)
251: (11 + 2) + (4 + 7)
252: 11 + 2 + 7 + 4
253: (11 + 2) + 7 + 4
254: (11 + 2 + 7) + 4
255: ((11 + 2) + 7) + 4
256: (11 + (2 + 7)) + 4
257: 11 + (2 + 7) + 4
258: 11 + (2 + 7 + 4)
259: 11 + ((2 + 7) + 4)
260: 11 + (2 + (7 + 4))
261: 11 + 2 +(7 + 4)
262: (11 + 2) + (7 + 4)
263: (11 + 2 - 7) × 4
264: ((11 + 2) - 7) × 4
265: (11 + (2 - 7)) × 4
266: 11 + 7 + 4 + 2
267: (11 + 7) + 4 + 2
268: (11 + 7 + 4) + 2
269: ((11 + 7) + 4) + 2
270: (11 + (7 + 4)) + 2
271: 11 + (7 + 4) + 2
272: 11 + (7 + 4 + 2)
273: 11 + ((7 + 4) + 2)
274: 11 + (7 + (4 + 2))
275: 11 + 7 +(4 + 2)
276: (11 + 7) + (4 + 2)
277: (11 - 7) × (4 + 2)
278: 11 + 7 + 2 + 4
279: (11 + 7) + 2 + 4
280: (11 + 7 + 2) + 4
281: ((11 + 7) + 2) + 4
282: (11 + (7 + 2)) + 4
283: 11 + (7 + 2) + 4
284: 11 + (7 + 2 + 4)
285: 11 + ((7 + 2) + 4)
286: 11 + (7 + (2 + 4))
287: 11 + 7 +(2 + 4)
288: (11 + 7) + (2 + 4)
289: (11 - 7 + 2) × 4
290: ((11 - 7) + 2) × 4
291: (11 - (7 - 2)) × 4
292: (11 - 7) × (2 + 4)
参考资料： http://www.dffy.com/tool/24.htm
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1: 4 + 2 + 7 + 11
2: (4 + 2) + 7 + 11
3: (4 + 2 + 7) + 11
4: ((4 + 2) + 7) + 11
5: (4 + (2 + 7)) + 11
6: 4 + (2 + 7) + 11
7: 4 + (2 + 7 + 11)
8: 4 + ((2 + 7) + 11)
9: 4 + (2 + (7 + 11))
10: 4 + 2 +(7 + 11)
11: (4 + 2) + (7 + 11)
12: 4 × (2 - 7 + 11)
13: 4 × ((2 - 7) + 11)
14: 4 × (2 - (7 - 11))
15: 4 + 2 + 11 + 7
16: (4 + 2) + 11 + 7
17: (4 + 2 + 11) + 7
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273: 11 + ((7 + 4) + 2)
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276: (11 + 7) + (4 + 2)
277: (11 - 7) × (4 + 2)
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279: (11 + 7) + 2 + 4
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282: (11 + (7 + 2)) + 4
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286: 11 + (7 + (2 + 4))
287: 11 + 7 +(2 + 4)
288: (11 + 7) + (2 + 4)
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291: (11 - (7 - 2)) × 4
292: (11 - 7) × (2 + 4)
参考资料： http://www.dffy.com/tool/24.htm
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11-(7-2)=6
6*4=24
6*4=24
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