[2(x-y)立方-8(x-y)平方乘(x+y) 6y(x-y)平方]除以2(x-y)平方[2(x-y)立方-8(x-y)平方乘(x+y) +6y(x-y)平方]除以2(x-y)平方 上面那个错了

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[2(x-y)立方-8(x-y)平方乘(x+y)6y(x-y)平方]除以2(x-y)平方[2(x-y)立方-8(x-y)平方乘(x+y)+6y(x-y)平方]除以2(x-y)平方上面那个错了[2(x-

[2(x-y)立方-8(x-y)平方乘(x+y) 6y(x-y)平方]除以2(x-y)平方[2(x-y)立方-8(x-y)平方乘(x+y) +6y(x-y)平方]除以2(x-y)平方 上面那个错了
[2(x-y)立方-8(x-y)平方乘(x+y) 6y(x-y)平方]除以2(x-y)平方
[2(x-y)立方-8(x-y)平方乘(x+y) +6y(x-y)平方]除以2(x-y)平方 上面那个错了

[2(x-y)立方-8(x-y)平方乘(x+y) 6y(x-y)平方]除以2(x-y)平方[2(x-y)立方-8(x-y)平方乘(x+y) +6y(x-y)平方]除以2(x-y)平方 上面那个错了

[2(x-y)立方-8(x-y)平方乘(x+y) +6y(x-y)平方]除以2(x-y)平方
=(x-y)-4(x+y)+3y
=-3x-2y