化简-2[(-x)^ 2y]^2 (-3x^m y^n)

(x+y)(m+n)2-(x+y)(m+n)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[-3(x+y)^m*(x-y)^2n]^2*[-(x+y)^2]=-a(x+y)^10*(x-y)^12-n,求m, 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( 设全集U=｛（x,y)|x,y属于R｝,集合M={(x,y)|(y-3)除以(x-2)=1},N={(x,y)|y不等于 选择题：设集合M={(x,y)|2x+3y=8},N={(x,y)|3x+2y=7},则M∩N= 已知集合M={（x，y）|y=x+3}，N={（x，y）|y=-2x+6}，则M∩N=______． 计算：(y-x)^3(x-y)^m-(x-y)^m+2(y-x) 已知集合M={（x,y)ly=2x+m,m属于R},集合N={(x,y)lx²+y²+2x+2y-3 2x^6n-x^4n×y^3m-y^9m,已知x^2n=3,y^3n=2,求值 已知x^3m=8,y^3n=27,求（x^2m)^3+(y^n)^3-x^2m*y^n 计算一,y-x分之x+y 加x-y分之y剪y-x分之2x-y= 二n-m分之m+2n加n-m分之n剪n-m分之2n=__