(x-2y)^m+1/(x-2y)^m-3/(2y-x)^3怎么算

(Y-X)^3*(X-Y)^m+(X-Y) ^m+1*(Y-X)^2 x^n*y*(-x^2y^m) 计算:(1).(2x-3y)/(y-x)-(x+2y)/(x-y) (2).[5m/(m-3)+2m/(m+3)]*(m^2-9)/m 分解因式x^m+3-2x^m+2y+x^m+1y^2 分解因式：x^m+3-2x^m+2*y+x^m+1*y^2 分解因式x^m+3-（2x^m+2）y+（x^m+1)y^2 (x-2y)^m+1/(x-2y)^m-3/(2y-x)^3怎么算 计算：2/1-m-1/m-1.2x/x-y -y/y-x -y-2x/x-y.12/m²-9 -2/m-3 计算：(y-x)^3(x-y)^m-(x-y)^m+2(y-x) 因式分解：(x+y)^2-2m(x+y)+m^2 m(2x+y)²-m(x+2y)² (x+y)(m+n)2-(x+y)(m+n)2 4m(x-y)-2m^2(y-x)^3 因式分解m²+2m(x+y)+(x+y)² （m-1)x^m^2y,是关于x,y的二次单项式,则m=? (x-y)m次方(y-x)2m次方+(y-x)3m次方得几 计算(x-y)^m(y-x)^2m+(y-x)^3m ab^2(x-y)^m+a^2b(x-y)^m+1-ab(x-y)^m因式分解哈