1242
4
21
784
12
21
532
7
21
515
1
21
2171
0
21
839
2
21
991
5
21
808
2
21
526
0
21
395
0
21
614
0
21
708
2
21
858
0
21
826
1
21
846
4
21
1410
0
21
558
1
21
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Keyword(s): math