413
6
18
305
7
18
466
0
18
263
0
18
736
0
18
591
4
18
597
0
18
552
0
18
587
0
18
394
0
18
596
0
18
548
0
18
808
0
18
653
2
18
334
4
18
423
18
18
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Keyword(s): math