1239
4
21
775
12
21
532
7
21
513
1
21
2171
0
21
839
2
21
991
5
21
805
2
21
526
0
21
394
0
21
612
0
21
708
2
21
826
1
21
853
0
21
842
4
21
1407
0
21
557
1
21
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Keyword(s): Math