\[ \boxed { 2\,x{\frac {\rm d}{{\rm d}x}}y \left ( x \right ) -y \left ( x \right ) -2\,{x}^{3}=0} \]
Mathematica: cpu = 0.005501 (sec), leaf count = 21 \[ \left \{\left \{y(x)\to c_1 \sqrt {x}+\frac {2 x^3}{5}\right \}\right \} \]
Maple: cpu = 0.0 (sec), leaf count = 15 \[ \left \{ y \left ( x \right ) ={\frac {2\,{x}^{3}}{5}}+\sqrt {x}{\it \_C1} \right \} \]