1038
0
16
739
0
16
694
0
15
484
4
15
750
0
15
679
2
15
847
0
15
949
2
15
671
0
15
587
0
15
539
0
14
586
0
14
559
0
14
413
0
14
459
0
14
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Keyword(s): 2次方程式