计算:\(\left( \dfrac{1}{2}+ \dfrac{1}{3}+ \dfrac{1}{4}+ \dfrac{1}{5}\right)-\left(1- \dfrac{1}{2}- \dfrac{1}{3}- \dfrac{1}{4}- \dfrac{1}{5}\right)-2\left( \dfrac{1}{2}+ \dfrac{1}{3}+ \dfrac{1}{4}+ \dfrac{1}{5}+ \dfrac{1}{6}\right) \)的结果是 。
进入组卷