1.用简便方法计算.
$\frac{2014}{2015}$×2016
$\frac{5}{6}$×$\frac{1}{13}$$+\frac{5}{9}$×$\frac{2}{13}$$+\frac{5}{18}$×$\frac{6}{13}$
$\frac{1}{1×2}$$+\frac{1}{2×3}$$+\frac{1}{3×4}$+…+$\frac{1}{2015×2016}$
$\frac{1}{2}+\frac{1}{4}$$+\frac{1}{8}$$+\frac{1}{16}$$+\frac{1}{32}$$+\frac{1}{64}$
(1$+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}$)×(1$+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}$$+\frac{1}{5}$)-(1$+\frac{1}{2}+\frac{1}{3}+\frac{1}{4}$$+\frac{1}{5}$)×$(\frac{1}{2}+\frac{1}{3}+\frac{1}{4})$.