合并同类项综合练习题39Word文档下载推荐.docx
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合并同类项综合练习题39Word文档下载推荐.docx
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17a2b+7b2c+23a2b+7b2c3x-7x2-8x+7x2+7
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2d-3d-2d8t-8e+3t+4e
3a-7c-7a+16c-20a-11c5ab+16ab+13ab+ab
7a2b-4b2c-12a2b+2b2c4z+4z2+8z-14z2+7
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26a2b+8y2z+6a2b+4y2z6m-2m2-5m-16m2-1
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5c-9c-6c4y-6e-6y-8e
5b+4n-18b-11n+13b-10n4mn-7mn+18mn+mn
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