X^3*y^(m-1)*x^(m+y)*y^(2n+2)=x^9y^9

(Y-X)^3*(X-Y)^m+(X-Y) ^m+1*(Y-X)^2 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 3（x-1)³y-（1-x）³z m(x-y)²-x+y x²(x+y)(y-x)-xy(x+y)(x-y) 因式分解 计算：(y-x)^3(x-y)^m-(x-y)^m+2(y-x) 4m(x-y)-2m^2(y-x)^3 (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 已知x>y,m X^3*y^(m-1)*x^(m+y)*y^(2n+2)=x^9y^9 因式分解:2x^5m-1 * y^m -4x^3m-1 * y^m+2 +2x^m-1 * y^n+4 计算题:9(x-y)^3[-1/9(x-y)^m+5](y-x)^2 若多项式5x*x-2mxy-3y*y+4xy-3x+1中不含xy项,求（-（m*m*m）+2（m*m）-m+1）-（m*m*m+2m*m-m+4） 已知方程组3x+2y=m+1,2x+y=m-1,当m为何值时,x>y且2x＜3y?