合并同类项综合练习题67.docx
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合并同类项综合练习题67.docx
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合并同类项综合练习题67
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1775
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18a2b-8b2c+19a2b+2b2c2t-3t2-5t-19t2-2
1875
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5757
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29a2b-6b2c-18a2b-4b2c7x+7x2+7x-2x2+4
2175
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4175
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7x2y+7y2z+9x2y+3y2z4y+8y2-9y+4y2-9
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