531
0
20
684
2
20
685
0
20
1142
2
20
408
0
20
238
0
20
1206
1
20
817
6
20
587
0
20
667
1
20
406
0
20
634
1
20
255
0
20
311
0
20
546
0
20
530
0
20
792
0
20
984
6
20
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Keyword(s): Math