What is the 2nd power of 1997 minus 1996 by 1997 How to write it?

What is the 2nd power of 1997 minus 1996 by 1997 How to write it?

(1997^2-1996*1998)/1997
=(1997^2-(1997-1)*(1997+1))/1997
=1/1997.

Given that m =1996+1995*1996+1995*1996 2+...+1995*1996 1994 power +1995*1996 1995 power, n =1996 power, then the relationship between m and n is Am=n+1995 B m=n+1996 C m=n D m=n-1996

M-n =1996+1995*1996+1995*1996 2+...+1995*1996's 1994 power +1995*1996's 1995 power -1996 power =1996+1995*1996+1995*1996 2+...+1995*1996's 1994 power +1995*1996's 1995 power =1996+1995*1...