1058
0
20
572
0
20
787
26
20
610
0
20
492
6
19
560
2
19
618
0
19
325
0
19
397
0
19
431
0
18
911
0
18
1123
12
18
399
2
17
449
0
17
846
7
17
244
0
17
528
0
17
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Keyword(s): maths