\[\Phi=zW_{0}^{\prime}-\varepsilon_{2}\sqrt{2\alpha_{0}}W_{0}^{2}+\varepsilon_{3%
}\sqrt{-2\beta_{0}}+\left(\varepsilon_{2}\sqrt{2\alpha_{0}}-\varepsilon_{3}%
\sqrt{-2\beta_{0}}+\varepsilon_{1}z\right)W_{0},\]