1472
17
61
1106
0
61
7916
0
61
1486
11
61
1981
5
61
1994
6
61
1367
0
61
1141
0
61
2388
0
61
1680
9
61
2603
29
61
1086
8
61
1548
8
61
1436
15
61
1123
6
61
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Keyword(s): #数学