\[ y'(x)=\frac {-x^2 \sqrt {x^2+y(x)^2}+x y(x) \sqrt {x^2+y(x)^2}+x^5 \left (-\sqrt {x^2+y(x)^2}\right )+x^4 y(x) \sqrt {x^2+y(x)^2}-x^4 \sqrt {x^2+y(x)^2}+x^3 y(x) \sqrt {x^2+y(x)^2}+y(x)}{x} \] ✓ Mathematica : cpu = 0.141082 (sec), leaf count = 189
\[\left \{\left \{y(x)\to \frac {x \left (-2 e^{\sqrt {2} c_1+\frac {\sqrt {2} x^5}{5}+\frac {x^4}{2 \sqrt {2}}+\frac {x^2}{\sqrt {2}}}+e^{2 \sqrt {2} c_1+\frac {2 \sqrt {2} x^5}{5}+\frac {x^4}{\sqrt {2}}+\sqrt {2} x^2}-1\right )}{2 e^{\sqrt {2} c_1+\frac {\sqrt {2} x^5}{5}+\frac {x^4}{2 \sqrt {2}}+\frac {x^2}{\sqrt {2}}}+e^{2 \sqrt {2} c_1+\frac {2 \sqrt {2} x^5}{5}+\frac {x^4}{\sqrt {2}}+\sqrt {2} x^2}-1}\right \}\right \}\]
✓ Maple : cpu = 0.317 (sec), leaf count = 65
\[ \left \{ \ln \left ( 2\,{\frac {x \left ( \sqrt {2\, \left ( y \left ( x \right ) \right ) ^{2}+2\,{x}^{2}}+y \left ( x \right ) +x \right ) }{y \left ( x \right ) -x}} \right ) +{\frac {\sqrt {2}{x}^{5}}{5}}+{\frac {\sqrt {2}{x}^{4}}{4}}+{\frac {\sqrt {2}{x}^{2}}{2}}-\ln \left ( x \right ) -{\it \_C1}=0 \right \} \]