\[ \left (y(x)^2-x^2\right ) y'(x)+2 x y(x)=0 \] ✓ Mathematica : cpu = 0.142776 (sec), leaf count = 61
DSolve[2*x*y[x] + (-x^2 + y[x]^2)*Derivative[1][y][x] == 0,y[x],x]
\[\left \{\left \{y(x)\to \frac {1}{2} \left (e^{c_1}-\sqrt {-4 x^2+e^{2 c_1}}\right )\right \},\left \{y(x)\to \frac {1}{2} \left (\sqrt {-4 x^2+e^{2 c_1}}+e^{c_1}\right )\right \}\right \}\] ✓ Maple : cpu = 0.047 (sec), leaf count = 47
dsolve((y(x)^2-x^2)*diff(y(x),x)+2*x*y(x) = 0,y(x))
\[y \left (x \right ) = \frac {1-\sqrt {-4 x^{2} c_{1}^{2}+1}}{2 c_{1}}\]