\(=\left(-\dfrac{1}{2}-\dfrac{1}{9}-\dfrac{7}{18}\right)+\left(\dfrac{-3}{5}+\dfrac{2}{7}+\dfrac{4}{35}\right)+\dfrac{1}{2023}\)
\(=\dfrac{-9-2-7}{18}+\dfrac{-21+10+4}{35}+\dfrac{1}{2023}\)
\(=\dfrac{1}{2023}-1-\dfrac{1}{5}=\dfrac{1}{2023}-\dfrac{6}{5}\simeq-1.199\)