若(3/4 x^3-m y^n)/(-x^n-5 y ^2)^2=3/4x^2y,则2m+2

把下列各式因式分解(2m+3n)(2m-n)-4n(2m-n)(x+y)^2(x-y)+(x+y)(y-x)^24a(x 若x^3m=4,y^3n=5,求（x^2m)^3+(y^n)^3—x^2m·y^n·x^4m·y^2n的值 若3x^m+1y^2与x^3y^n的积是单项式3x^5y^5则n^m+m^n= 若x^3m=4,y^3n=5,求（x^2m)^3+(y^3n)^2 若全集I={(x,y)|x,y∈R},集合M={(x,y)|(y-3)/(x-2)},N{(x,y)|y=x=1},则( 若[-3(x+y)^m*(x-y)^2n]^2*[-(x+y)^2]=-a(x+y)^10*(x-y)^12-n,求m, 3x+4y=-5 5x+6y=-9 (n-8m)x-8y=10 5x+(10m+2n)y=-9 求m.m+n.n=? 2x^6n-x^4n×y^3m-y^9m,已知x^2n=3,y^3n=2,求值 若3x^(m+5)y^2与x^2y^n的和是单项式,则n^m= 若(3x*m+2n)y*8与(-2x*2)y*3m+4n是同类项,则m+n=? 若多项式3x (m+2n) y和-4x(3) y(3m-2n)是同类项,则m= .n= .(___)中是次方 若x的2m-n次方+3y的3n-m次方=4是关于x,y的二元一次方程,则m=( ),n=( )