计算：—x^n y^n+1*（x^3y^2n)2=________.计算：(2a^3b^4)3+(—3a^3b^4)3+(—a^3b^4)3=_______________.式子2xy(—2x^2y^2)*(—3x^3y)的结果是__________.

(x^n+y^n)(x^n-y^n)-(x^n+y^n)² 计算. 计算 (-x-y)^2n乘(-x-y)^3 计算(x-y-m+n)(x-y+m-n) 4(x-y)^n+1-3(y-x)^n 计算:(-x^n)^2(-y^n)^3-(x^2y^3)^n 计算(x^2y^3)^n+(-x^n)^2*(-y^n)^3等于多少 计算n阶段行列式 请帮我解答：计算此3阶段行列式 | x y x+y| | y x+y x | |x+y x y || x y x+y || y x+y x | |x+y x y | (-2x^n+1y^n)·(-3xy)·（-1/2x²z)计算 (-2x^n+1y^n)·(-3xy)·（-1/2x²z)计算 计算(x-y)的n次方*[(y-x)的3次方+5(x+y)的n次方(y-x)的2n次方]=______(n为正整数) 计算(x-y)^3n*(y-x)^2n÷(y-x)^5n（n为正整数,且x≠y） 计算：(x-y)^2/(x+y)÷(y-x)×1/(x-y)(m^2-4n^2)/(3mn^3)×mn/(m+2n) 计算：（x^2n-2x^ny^n+y^2n)/(x^n-y^n)（n为正整数）= 怎么计算(x-y)^m*(x-y)^（n+2）*(y-x)^3 计算 (x-2y)的n次方·(2y-x)的2n-1次方 [(x+y)^2n]^4/(-x-y)^(2n+1)计算快 计算：[(x+y)^2n]^4÷(-x-y)^2n+1 3n【x+y】-x-y因式分解