合并同类项综合练习题121.docx
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合并同类项综合练习题121.docx
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合并同类项综合练习题121
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2b+3c+16b-18c+14b-19c4xy-20xy-17xy+xy
15x2y+2y2z+8x2y+7y2z2n-8n2+4n+11n2-4
1175
—m+—n+—n+—m13y2+2mn+2y2+2
2828
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8f-9f-6f9y+5c+4y-6c
9a+2d-5a+19d+12a+16d8xy+2xy-19xy+xy
3x2y-6y2z+25x2y+7y2z4y+6y2-8y+12y2-5
6875
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5757
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8
3c+4c-6c5m+6a-7m-7a
3a+9d+2a+17d+19a+17d5mn+11mn+13mn+mn
11x2y+2b2c-6x2y-4b2c8t+2t2-7t-20t2-3
4775
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8
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1675
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21x2y-4b2c+4x2y+9b2c7t+9t2+7t-8t2+4
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4a-7c-2a-6c-10a-17c4pq+5pq-17pq-pq
21a2b+8y2z+12a2b+7y2z2y-4y2+7y-12y2+4
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5b+4n+11b+4n+20b+11n9xy+20xy+16xy+xy
5a2b+6y2z-17a2b+3y2z9t-2t2+4t+2t2+1
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