\[\frac{{\partial}^{4}\Psi_{3}}{{\partial x}^{4}}-\frac{3}{5}z\frac{{\partial}^{%
2}\Psi_{3}}{{\partial x}^{2}}-\frac{2i}{5}y\frac{\partial\Psi_{3}}{\partial x}%
+\frac{1}{5}x\Psi_{3}=0.\]