-8(2x-y)-{7x-[6x+2y-(10x-8y)]}等于多少?

【2(x-y)(x-y)(x-y)-8(x-y)(x-y)(x+y)+6y(x-y)(x-y)]/2(x-y)(x-y) 3(x-y)^2-7(x-y)+8(y-x)^2+6(y-x)合并同类项. -6x-y-7x+6x-2y-10x+8y+x+6x-8y的值 -8(2x-y)-{7x-[6x+2y-(10x-8y)]}等于多少? [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)^3-8(x-y)^2(x+y)+6y(x-y)^2】/2(x-y)^2= (x-y)^2+7(x+y)-11(x-y)^2-8(x+y),先化简.再求值 （x-y)^2+7(x+y)-11(x-y)^2-8(X+Y)的计算过程 4x-3y/x-2y÷6y-8x/y-2x 18(x+y)^8(x-y)^7÷[3(x+y)^3(x-y)^3]^2 若(x-y)/(x+y)=3 则(x+2y)/(6x-7y)等于 {6(x-y)-7(x+y)=21 {2(x-y)-5(x+y)=-1 计算：(x-y)^7÷(y-x)^6+(-x-y)^3÷(x+y)^2 2(y-x)的平方-7(x-y)+6(x-y)-3(y-x)的平方 计算(x-y)^7÷(y-x)^6+9-x-y)^3÷(x+y)^2 81/8*(-x-y)^6*(x-y)^3*4/9(x+y)^4*(y-x)^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) 因式分解:8(x-2y)-x(7x+y)+xy.