(2003/1-1)(2002/1-1)(2001/1-1)(2000/1-1)(1999/1-1)...(1001/1-1)(1000/1-1)

(2003/1-1)(2002/1-1)(2001/1-1)(2000/1-1)(1999/1-1)...(1001/1-1)(1000/1-1)

(1/2003-1)(1/2002-1)(1/2001-1)(1/2000-1)(1/1999-1)...(1/1001-1)(1/1000-1) Because there are (2003-1000), i.e.1003 integral forms multiplied, each formal is negative, i.e. the final result is negative =-(2002/2003)(2001/2002)(2000/2001)...

(1/2003-1) X (1/2002-1) X (1/2001-1) X (1/2000-1) X1/1999-1)...(1/1001-1) X (1/1000 Request (1/2003-1) X (1/2002-1) X (1/2001-1) X (1/2000-1) X1/1999-1)...(1/1001-1) X (1/1000

Original =(-2002/2003) X (-2001/2002) X (-2000/2001)...(-1000/1001) X (-999/1000)
=999/2003