$\frac{1}{2014}$ -$\frac{1}{2014.2013}$ -...-$\frac{1}{3.2}$ -$\frac{1}{2.1}$
= $\frac{1}{2014}$ -$\frac{1}{2014}$ + $\frac{1}{2013}$- ...-$\frac{1}{3}$ + $\frac{1}{2}$ -$\frac{1}{2}$ + 1
= $\frac{2}{2014}$ - 1
= $\frac{-1006}{1007}$
( 8 - $\frac{-9}{4}$ + $\frac{2}{7}$ )- ( -6 - $\frac{3}{7}$ + $\frac{5}{4}$ ) - ( 3 + $\frac{2}{4}$ - $\frac{9}{7}$ )
= ( 8 + 6 - 3) - ($\frac{9}{4}$ + $\frac{5}{4}$ + $\frac{2}{4}$ ) + ($\frac{2}{7}$+ $\frac{3}{7}$+ $\frac{9}{7}$ )
= 11- 4 + 2
= 7 + 2
= 9
