1.x(x-y)-(x-3)(x+3) 2.（a^2+b^2)(a+b)(a-b) 3.(a-2b+3c)(a+2b-3c) 4.(x+y-z)(x-y+z) 5.(x^8+y^8)(x^4+y^4)(x^2+y^2)(x+y)(x-y)

(3x-y)(3y+x)-(x-y)(x+y) [2/3x-2/x+y(x+y/3x-x-y)]/x-y/x 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x 化简：{2/3x-2/(x+y)[(x+y)/3x-x-y]}/(x+y)/x 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x x(x-y)2-(y-x)3 （y-x)+x(x-y)^3-(y-x)^4 因式分解 用递归法求y=x-(x*x*x/3!)+(x*x*x*x*x/5!)-(x*x*x*x*x*x*x/7!)+. 1.（x+2)^2-(x+y)^32.(x-y)^2-(x-y)^33.(x-y)^2-(y-x)^3 化简 3x(x^2-x-1)-(x+1)(3x^-x) X^3(x-y)+x(y-x) 1.) 5/x-x+12-2x/2x-2x 2)y/2x-2y/3x 3^x+2x=y,x 3x的平方×（x-y)+6x(y-x) 因式分解3x^2(x-y)+6x(y-x) 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} 计算 x(x-3y) 推倒公式:(x+y)(x*x-3x+y*y)=x*x*x+y*y*y怎么做. 因式分解：a(x-y)^2+b(y-x)^3 4(x-y)^2+8(y-x)(x+y)1.a(x-y)^2+b(y-x)^3 2.4(x-y)^2+8(y-x)(x+y)