\[ \left (y(x)^2-x^2\right ) y'(x)+2 x y(x)=0 \] ✓ Mathematica : cpu = 0.0341071 (sec), leaf count = 61
\[\left \{\left \{y(x)\to \frac {1}{2} \left (e^{c_1}-\sqrt {e^{2 c_1}-4 x^2}\right )\right \},\left \{y(x)\to \frac {1}{2} \left (\sqrt {e^{2 c_1}-4 x^2}+e^{c_1}\right )\right \}\right \}\] ✓ Maple : cpu = 0.072 (sec), leaf count = 47
\[ \left \{ y \left ( x \right ) ={\frac {1}{2\,{\it \_C1}} \left ( 1+\sqrt {-4\,{{\it \_C1}}^{2}{x}^{2}+1} \right ) },y \left ( x \right ) ={\frac {1}{2\,{\it \_C1}} \left ( 1-\sqrt {-4\,{{\it \_C1}}^{2}{x}^{2}+1} \right ) } \right \} \]