(9/2 rad 6 - 8/3 rad 6 - 4/rad 6) - (16/5 rad 6 - 33/10 rad 6) - (3/rad 6 - 8/3 rad 6) = (27/6 rad 6 - 16/6 rad 6 - 24/6 rad 6) - (32/10 rad 6 - 33/10 rad6) - (9/3 rad 6 - 8/3 rad 6 ) = -13/6 rad 6 - (-1/10 rad 6) - 1/3 rad 6 = -13/6 rad 6 + 1/10 rad 6 - 1/3rad 6 = -65/30 rad 6 + 3/30 rad 6 - 10/30 rad 6 = -72/30 rad 6 = -12/5 rad 6