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)

化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x [(-x-y)(-x+y)-(x+y)^2-x(y-y^2)}÷1/2y [(x+y)(x-y)-(x-y)²+2y(x-y)]÷4y x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 (x+y)-(x-y)^3÷(x-y)(x+y)×2y化简e , 化简y(x+y)+(x+y)(x-y)-x^2 (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² [2(x-y)^5-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2[2(x-y)^3-8(x-y)^2(x+y)+6y(x-y)^2]÷2(x-y)^2 【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 因式分解x(x+y)(x-y)-x(x+y)^2 计算：1.（x-1)^2+2(1-x) 2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y）1.（x-1)^2+2(1-x)2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y） [(-2x-y)^2-(2x+y)(2x-y)]÷2y-1/2y [(x+2y)^2-(x-y)(x+2y)-5y^2]÷(2y) 1.（x+2)^2-(x+y)^32.(x-y)^2-(x-y)^33.(x-y)^2-(y-x)^3 [(2x+y)-(2x+y)(2x-y)]÷2y-二分之一y [(x+2y)²-(x+y)(x-y)-7y²】÷（2y） 化简【(x²+y²)-(x-y)²+2y(x-y)】÷4y