260
5
5
349
0
4
150
0
4
186
0
4
315
0
4
195
0
4
150
0
4
204
1
3
222
0
3
177
2
3
215
0
3
201
0
3
208
0
3
192
0
2
Didn't find what you're looking for? Try searching on Q&A, too!
Keyword(s): 2次方程式