【2/(m+n)^3】*【(1/m)+(1/n)】+【1/(m^2+2mn+n^2)】*【(1/m^2)+(1/n^2)

m(m+n)(m-n)-m(m+n)的平方,其中m+n=1,mn=-1/2 化简：1/(m-n)根号(m^3-2m^2n+mn^2)(m 数学题[(m+3n)(m-3n)+(2n-m^2)+5n^2(1-m)-(2m^2-m^2n)÷(-1/2mn) 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 先化简（m/m-n-n/m+n+2mn/m²-n²)²÷m²+mn/m,若m=1 mn(1/m-1/n)÷m^2-n^2/m+n (1)(m^2+n^2/m-n) +2mn/n-m