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105
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42720
13
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2
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7
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8
668
16612
2
488
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5
386
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3
336
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7
331
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0
296
10672
13
289
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2
288
9062
6
211
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0
197
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2
179
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7
161
5268
4
153
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Keyword(s): 2次方程式