若3a^m-1 bc^2和-2a^3 b^n-2 c^2是同类项,则3m^2 n-2mn^2+2m^2 n+4mn^2-
合并多项式中的同类项:m^3-m^2n+mn^2+m^2n-mn^2+n^3+1
(a^m)^n*(-a^3m)2n/(a^mn)^5-a^2mn
若m-n=4,mn=-1求(9-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)
若m-n=4,mn=-1,求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
若m-n=4,mn=-1,求(-2mn+m+n)-(3mn+5n-5m)-(m+4n-3mn)的值
已知7a的m+2次方b的|m|+1次方和12a的n的二次方+2次方是同类项,且m,n互为相反数,求m-mn-3(m-1/
化简:(-n/m)÷n/m^2-m的结果是( )A.-m-1 B.-m+1 C.-mn+m D.-mn-n
已知m-n=2,mn=1,求多项式(2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知|m-n-2|与(mn-1)^互为相反数,求(-2mn+2m+3n)-(3mn+2n-2m)-(m+4n+mn)的值
已知m-n=3,mn=-1,求多项式-2mn+2m+3n-3mn-2n+2m-4n-m-mn的值
若单项式-3a^mb^n-2与2a+b是同类项,求2(3m^2-n^2)-3(2mn-3n^2)+(m^2-mn)的值
3(m^2n+mn)-4(mn-2m^2n)+mn.