1.[(x-y)^2-2(y -x)]÷(x-y)

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1.[(x-y)^2-2(y -x)]÷(x-y)
2.[(3a-7)^2-(a+5)^2]÷(4a-24)
3.(1-16^4)÷(4x^2+1)÷(2x+1)
4.(x+y)^3-2(x+y)^2+(x+y)
5.a(x-y)-a^2(y-x)

1.[(x-y)^2-2(y -x)]÷(x-y)
=[(x-y)^2+2(x-y)]÷(x-y)
=(x-y)(x-y+2)÷(x-y)
=x-y+2
2.[(3a-7)^2-(a+5)^2]÷(4a-24)
=(3a-7+a+5)(3a-7-a-5)÷4(a-6)
=(4a-2)(2a-12)÷4(a-6)
=4(2a-1)(a-6)÷4(a-6)
=2a-1
3.(1-16^4)÷(4x^2+1)÷(2x+1)
我感觉有错
4.(x+y)^3-2(x+y)^2+(x+y)
=（x+y)[(x+y)^2-2(x+y)=1]
=(x+y)(x+y-1)^2
5.a(x-y)-a^2(y-x)
=a(x-y)+a^2(x-y)
=a(x-y)(1+a)

1.[(x-y)^2-2(y -x)]÷(x-y) [(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y [x(x-y)-y(x-y)+(x+y)(x-y)]÷2x其中x=2012 y=2013 1、x(x-y)(x+y)-x(x+y)^2 1.(x-2y)(x+2y)-(x平方+y)(x平方-y) 2.(2x-y)(y+2x)-(2y+x)(2y-x) (1)(x^2/x)-y-x-y 【(x-y)^2+(x+y)(x-y)】除以 2x [(x+2y)^2 -(x+y)(3x-y)-5y^2]÷2x 计算：(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2 化简:【(2x-y)(2x+y)+y(y+6x)】÷2x [(2x+y)(x-3y)+y(x+3y)]÷(2x)计算, 1.（（y+2x)(-2x+y)+4(x+2y)^2)/3y 2.（2(x-y)^3-8(x-y）^2(x+y)+6y(