\[ a x^3 y'(x) y''(x)+b y(x)^2=0 \] ✗ Mathematica : cpu = 1.12828 (sec), leaf count = 0
DSolve[b*y[x]^2 + a*x^3*Derivative[1][y][x]*Derivative[2][y][x] == 0,y[x],x]
, could not solve
DSolve[b*y[x]^2 + a*x^3*Derivative[1][y][x]*Derivative[2][y][x] == 0, y[x], x]
✓ Maple : cpu = 0.071 (sec), leaf count = 42
dsolve(a*x^3*diff(y(x),x)*diff(diff(y(x),x),x)+b*y(x)^2=0,y(x))
\[y \left (x \right ) = {\mathrm e}^{\int _{}^{\ln \left (x \right )}\RootOf \left (-\left (\int _{}^{\textit {\_Z}}\frac {a \textit {\_a}}{a \,\textit {\_a}^{3}-\textit {\_a}^{2} a +b}d \textit {\_a} \right )-\textit {\_b} +c_{1}\right )d \textit {\_b} +c_{2}}\]