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    推荐答案   2008-02-20
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
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    其他回答
    第1个回答  2008-02-20
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
    (4x^2+5xy-7x)-(5x^2y+4xy+x)
    =4x^2+5xy-7x-5x^2-4xy-x
    =-x^2+xy-8x.
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