247
0
19
373
0
19
459
0
19
424
0
19
487
0
19
677
0
19
496
0
19
1094
0
19
860
1
19
1361
0
19
699
4
19
564
2
19
332
0
19
2476
7
19
1035
1
19
722
0
19
891
0
19
672
0
19
1002
0
19
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Keyword(s): math