489
2
9
246
2
9
721
0
9
608
0
9
421
0
9
286
4
9
384
0
9
339
0
9
541
2
9
292
0
9
287
0
9
544
0
9
286
2
9
372
0
9
289
0
9
197
2
9
221
0
9
419
1
9
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Keyword(s): Math