5659
0
73
742
7
72
1537
0
72
1783
2
72
2054
0
72
3762
1
72
1805
4
72
3458
8
72
828
3
72
1891
3
72
18488
5
71
2388
0
71
1168
2
71
561
2
71
3110
13
71
1491
0
71
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Keyword(s): 数学