(-1/3+7/12-9/20+11/30-13/42+15/56)x8x2010
=(-4/12+7/12-9/20+11/30-13/42+15/56)x8x2010
=(3/12-9/20+11/30-13/42+15/56)x8x2010
=(1/4-9/20+11/30-13/42+15/56)x8x2010
=(5/20-9/20+11/30-13/42+15/56)x8x2010
=(-4/20+11/30-13/42+15/56)x8x2010
=(-1/5+11/30-13/42+15/56)x8x2010
=(-6/30+11/30-13/42+15/56)x8x2010
=(5/30-13/42+15/56)x8x2010
=(1/6-13/42+15/56)x8x2010
=(7/42-13/42+15/56)x8x2010
=(-6/42+15/56)x8x2010
=(-1/7+15/56)x8x2010
=(-8/56+15/56)x8x2010
=7/56x8x2010
=1/8x8x2010
=2010