\[ y'(x)=\frac {x^2 \sqrt {x^2+y(x)^2}+y(x)}{x} \] ✓ Mathematica : cpu = 0.137231 (sec), leaf count = 20
\[\left \{\left \{y(x)\to x \sinh \left (\frac {1}{2} \left (x^2+2 c_1\right )\right )\right \}\right \}\] ✓ Maple : cpu = 4.142 (sec), leaf count = 30
\[\left \{-\frac {x^{2}}{2}-c_{1}-\ln \left (x \right )+\ln \left (y \left (x \right )+\sqrt {x^{2}+y \left (x \right )^{2}}\right ) = 0\right \}\]