先化简,再求值2m-(n+1)+（m²-2mn+n²-1）/m-n-1 ,其中m=2,n=3

先化简,再求值2m-(n+1)+（m²-2mn+n²-1）/m-n-1 ,其中m=2,n=3
先化简,再求值2m-(n+1)+（m²-2mn+n²-1）/m-n-1 ,其中m=2,n=3

先化简,再求值2m-(n+1)+（m²-2mn+n²-1）/m-n-1 ,其中m=2,n=3
2m-(n+1)+（m²-2mn+n²-1）/m-n-1
=2m-n-1+(m-n+1)(m-n-1)/(m-n-1)
=2m-n-1+m-n+1
=3m-2n
=6-6
=0