(1994²-2000)×(1994²+3985)×1995/1991×1993×1996×1997
(1994²-2000)×(1994²+3985)×1995/1991×1993×1996×1997
(1994^2-2000)*(1994^2+3985)*1995/1991*1993*1996*1997
计算:(1994^2-2000)(1994^2+3985)*1995/1991*1993*1996*1997
2000+1999-1998-1997+1996+1995-1994-1993+1992+1991
1998+1997+1996+1995+1994+1993+1992+1991=
2001-2000-1999+1998+1997-1996+1995-1994-1993+1992+1991-1990+
1991+1992+1993+1994+1995+1996+1997+1998+1999+2000+2001+2002=
1991+1992+1993+1994+1995+1996+1997+1998+1999+2000+2001+2001
试说明1991^1992+1993^1994+1995^1996+1997^1998+1999^2000能被5整除
2003+1991-1992+1993-1994+1995-1996+1997-1998+1999-2000+2001-
1997+1996-1995-1994+1993+1992……=()
2000+1999-1998+1997-1996+1995-1994+1993-……+3-2+1=( )