1994+1996+1998+2000+2002+2004+2006/1995+1997+1999+2001+2003+
1994+1996+1998+2000+2002+2004+2006/1995+1997+1999+2001+2003+
1994+1996+1998+2000+2002+2004+2006分之1993+1995+1997+1999+2001
2003-2002+2001-2000+1999-1998+1997-1996+1995-1994+.+3-2+1=?
2003+2002+2001-2000-1999-1998+1997+1996+1995-1994-1993-1992.
1997/1998+1999/2000+2001/2002+2003/2004+2005/2006
1991+1992+1993+1994+1995+1996+1997+1998+1999+2000+2001+2002=
2003+1991-1992+1993-1994+1995-1996+1997-1998+1999-2000+2001-
2001+1995+2000+2003+1998+1997+1994+2002 简算
2005*1997+2004*1998+2003*1999+2002*2000+2001*2001
2004+2003+2002-2001-2000+1999+1998-1997-1996+...+4+3-2-1
2005+2004-2003-2002+2001+2000-1999-1998+1997+1996-.-7-6+5+4-
若1999分之1997+1998+1999+2000+2001=N分之2002+2003+2004+2005+2006,