What about 2001-1998 + 1995-1992.12-9 + 6-3?

What about 2001-1998 + 1995-1992.12-9 + 6-3?


This problem can't be solved because it is wrong. It should be 2001-1998 + 1995-1992 +. + 15-12 + 9-6 + 3-0 = 333 * 3 = 999