\(=\left(-\dfrac{2}{3}+\dfrac{1}{2}:\dfrac{9}{4}\right)+\left[\left(\dfrac{6}{5}-\dfrac{7}{5}\right)\cdot\dfrac{5}{2}+6\right]\)
\(=\left(-\dfrac{2}{3}+\dfrac{4}{18}\right)+\left(\dfrac{-1}{5}\cdot\dfrac{5}{2}+6\right)\)
\(=\dfrac{-12+4}{18}+\dfrac{-1}{2}+6=\dfrac{-8}{18}+\dfrac{-9}{18}+\dfrac{108}{18}=\dfrac{91}{18}\)