1513
9
63
898
1
63
1955
15
63
1820
3
63
984
0
63
1688
6
63
1817
12
63
1448
4
63
2716
0
63
2116
5
63
2002
0
63
2027
0
63
2199
3
63
676
2
63
896
0
63
1340
7
63
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Keyword(s): 数学