2260
2
118
1802
1
87
1626
4
85
958
11
68
724
2
39
471
0
31
525
2
25
515
4
18
263
1
16
587
7
16
315
0
12
401
3
11
354
0
11
261
0
10
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Keyword(s): 一次方程式 方程式