计算：（x√y/x-2y√x/y)(x√y/x+2y√x/y)求你们帮帮忙啊

计算：｛x√x+x√y / xy-y²}-{x+√xy+y / x√x-y√y} 计算：（x√y/x-2y√x/y)(x√y/x+2y√x/y)求你们帮帮忙啊 计算:y-x分之x+y+x-y分之y-y-x分之2x-y 计算2/3x-2/x+y(x+y/3x-x-y)/x-y/x 计算2x/x-y 计算√(1/x^2+y^2) 计算(-x-y)(y-x)+(-x-y)(x+y), 计算[2x^2-(x+y)(x-y)][(-x-y)(y-x)+2y^2] 计算：x+2y/x-y+2x/y-x-3y/x-y 行列式计算 x y x+y y x+y x x+y x y|x y x+y ||y x+y x ||x+y x y | 计算:(x+2y)(2x-y) 计算:(x+3y)(2x-y) 计算:(2x-3y)(x+y) 计算:(-x-2y) * (3x-y) 计算：(x+y)-3(x-2y). 计算：[(x+y)(x-y)-(x-y)^2+2y(x-y)]/(-2y) 计算:(x-y)^2*(y-x)^2*(x-y)^6 计算(x-y)(y^2-x^2)(-x-y)