化简-根号2^2y/3根号xy^2

化简:((根号x-根号y)^3+2x根号x+y根号y)/(x根号x+y根号y)+(3根号xy-3y)/(x-y) 化简-根号2^2y/3根号xy^2 化简：5根号X＾3Y－2Y根号XY－6根号XY＋根号X分之Y＋根号Y分之X 化简:(x-y)除以(根号x+根号y)-(x-2根号xy+y)除以(根号x-根号y) 3根号xy分之2根号x的平方y x根号x+x根号y/xy-y^2)-（x+根号xy+y/x根号x-y根号）y 【(x-y)^3(x^1/2+y^1/2)^-3+3(x根号y-y根号x)】/(x根号x+y根号y)+(2xy根号xy- 已知y=根号1-x+根号x-1+3,求根号x+根号y分之x+2根号xy+y+根号x-根号y分之一的值 {化简} [x+y/(根号x+根号y)]+[2xy/x·根号y+y·根号x] 化简x十Y/根号x十根号y十2Xy/x根号y十y根号x 已知根号x(根号x-根号y)=根号xy+3y,求(3x-y)分之2x+3倍根号xy-y 的值 ①{（x+y）/（根号x+根号y）}+{2xy/根号xy（根号x+根号y）}