984
0
53
12408
0
53
1741
7
53
1219
0
53
757
4
53
2297
3
53
1998
5
53
1558
6
53
2429
2
53
2255
3
53
1463
3
53
1791
10
52
1493
6
52
1860
5
52
1657
0
52
1423
0
52
1788
17
52
1184
8
52
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Keyword(s): 数学