数学题(2x+3y+2)(2x+3y-2)

一道数学题,(x-y)^3×(x-y)^2×(y-x) 第二数学题,因式分解(x-y)^3-(y-x)^2 数学题(x+y+3)(x^2+y^2+2xy-3x-3y+9) 问个数学题,（2x+3y）^2-(2x+y)(2x-y) 数学题（2x+y)：（x+2y)=2：3,x：y得多少 数学题求解解下列方程组x+y/2 +x-y/3=62(x+y)-x=-49x+7y=397x+9x=41 数学题化简再求值（1/x-y+1/x+y）÷x^2 y^2/x^2-y^2,其中x=3,y=-√2 初一数学题求(x+y)(2x-y)-(x+2y)(x-2y)的值,其中x=3,y=4如题 x(x-y)2-(y-x)3 [2/3x-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 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x 初二数学题(x-y/x+2y)的立方 计算：x+2y/x-y+2x/y-x-3y/x-y 化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方 [(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y) 数学题求解(3x-2y)(9x^2+6xy+4y^2)(27x^3+8y^3)