计算：6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y

计算：6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y
计算：6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y

计算：6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y
6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y
=6x²y-6x²y+2xy-5yx-3x²y²-4y²x²-7x
=0-3xy-7x²y²-7x
=-x(3y+7xy²+7)

计算：6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y
合并同类项得
（6x²y-6x²y）+（2xy-5xy）+（-3x²y²-4y²x²）-7x
=0-3xy-7x²y²-7x
=-3xy-7x²y²-7x

6x²y+2xy-3x²y²-7x-5yx-4y²x²-6x²y
=6x²y-6x²y+2xy-5xy-3x²y²-4x²y²-7x
=-3xy-7x²y²-7x