8x+2y+（5x-2y） X^2+（-3x^2-2y+1) 3a-(4b-2a+1）

【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 2(x-y)+3（x+y）2-5(x-y)-8（x+y）2-（x-y） (2x+y)²+(x+3y)(x-3y)-x(5x+8y)因式分解 [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 x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 （x-y)(x-y)2(y-x) (x+2y-?）(x-2y+?) -(x-y)^2-2(y-x)^2-5(x-y)^2+8(x-y)^2化简 5(x-y)^2-(x-y)-8(x-y)^2-3(x-y) （x-y）^3×（y-x）^4+（x-y）^2×（y-x）^5 化简y(x+y)+(x+y)(x-y)-x^2 化简(4x-2y)-[5x-(8y-2x-x-y)]+x 化简(4x-2y)-﹛5x-[8y-2x-(x+y)]-x﹜ 因式分解x(x+y)(x-y)-x(x+y)^2 计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2) (x+y)(x-y)-(x-y)^2如题 (x+y)(x-y)-(x-y)^2 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/（x^2-5x+6）+（x^2-3x+8）/（x^2-4x+3）2.{(x^2)/（x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{（x^2/x^2+y^2）^2} 5x(x-y)+2y(x-y) 化简:5(x-y)+2(x+y)-3(x-y)