\[\frac{\mathrm{d}}{\mathrm{d}\eta}\left((1-\eta^{2})\frac{\mathrm{d}w_{2}}{%
\mathrm{d}\eta}\right)+\left(\lambda+\gamma^{2}(1-\eta^{2})-\frac{\mu^{2}}{1-%
\eta^{2}}\right)w_{2}=0,\]