\[
\boxed{
{\frac {{\rm d}^{2}}{{\rm d}{x}^{2}}}y \left( x \right) ={\frac {{\frac {\rm d}{{\rm d}x}}y \left( x \right) }{x\ln  \left( x \right) }}+ \left( \ln  \left( x \right)  \right) ^{2}y \left( x \right) =0}
\]