\[
\boxed{
{\frac {\rm d}{{\rm d}x}}y \left( x \right) =i/2x \left( i-2\,\sqrt {-{x}^{2}+4\,\ln  \left( a \right) +4\,\ln  \left( y \left( x \right)  \right) } \right) y \left( x \right) =0}
\]