2108
24
51
671
9
51
839
2
51
856
0
50
869
0
50
1509
4
50
694
3
50
375
0
50
1864
9
50
2607
5
50
1772
3
50
955
0
50
2043
7
50
2166
2
50
1497
8
50
1115
0
50
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Keyword(s): #数学