1501
0
64
855
5
63
1419
9
63
853
1
63
1686
3
63
909
0
63
1640
12
63
1359
4
63
2555
0
63
1856
0
63
1909
0
63
2120
3
63
592
2
63
853
0
63
1277
7
63
1325
0
63
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Keyword(s): math