(m+2n)(m-3n)=m*m-3nm+2nm-6n^2=m^2-nm-6n^2

(m+2n)(m-3n)=m*m-3nm+2nm-6n^2=m^2-nm-6n^2 1对于正整数n和m,定义nm!（m是下标）=（n-m）（n-2m）（n-3m）...(n-km),其中m 化简m-(m^2×n+3m-4n)+(2nm^2-3n) 计算:(a^m)^n*(-a^3n)^2m除以(a^nm)^5-a^2nm m+2m^2+3m^3+4m^4+...nm^n=?能不能给个过程 m-[n-3m-(m-n)]=? 已知|m-2|+(n+1/5)^2=0,求m-(m^2n+3m-4N)+3(2nm^2-3n)的值 已知M+N=4分之3,m-n=四分之一 m^2-2nm+3m+3n+n^2 已知|m-2|+(n+1/5 )²=0,求m-(m²n+3m-4n)+3(2nm²-3n)的值 已知丨m-2丨+(n+5/1)²=0,求m-(m²n+3m-4n)+3(2nm²-3n)的值 已知2m^2n+2mn-3nm^2-3nm+4m^n,其中m是最小正整数,n'是绝对值=1的数,求值 (m-n)^3(n-m)^2(m-n)=_____ (3m-n)(m-2n)=() 已知m+n=3/4.m-n=1/4,求m^2+nm-3m-3n的值 已知m+n=四分之三,m-n=四分之一,求m^2+nm-3m-3n的值 已知3m=4n,则m/m+n+n/m-n-m^2/m^2-n^2= m/n=5/3,求（m/m+n）+（m/m+n)-（n^2/m^2-n^2) 已知m/n=5、,求（m/（m+n）)+(m/(m-n))-(n^2/(m^3-n^2))