(-2000+5/6)+(-1999+2/3)+4000+2/3+(-1+1/2) Be in a hurry

(-2000+5/6)+(-1999+2/3)+4000+2/3+(-1+1/2) Be in a hurry

The original formula = (- 2000-1999 + 4000-1) + (5 / 6 + 2 / 3 + 2 / 3 + 1 / 2) = 5 / 6 + 8 / 6 + 3 / 6 = 8 / 3