\[ y'(x)=\frac {x^3 \sqrt {x^2+y(x)^2}+y(x)}{x} \] ✓ Mathematica : cpu = 0.118584 (sec), leaf count = 20
DSolve[Derivative[1][y][x] == (y[x] + x^3*Sqrt[x^2 + y[x]^2])/x,y[x],x]
\[\left \{\left \{y(x)\to x \sinh \left (\frac {1}{3} \left (x^3+3 c_1\right )\right )\right \}\right \}\] ✓ Maple : cpu = 3.871 (sec), leaf count = 30
dsolve(diff(y(x),x) = (y(x)+x^3*(y(x)^2+x^2)^(1/2))/x,y(x))
\[\ln \left (\sqrt {y \left (x \right )^{2}+x^{2}}+y \left (x \right )\right )-\frac {x^{3}}{3}-\ln \left (x \right )-c_{1} = 0\]