✓ Mathematica : cpu = 0.0591991 (sec), leaf count = 54
DSolve[-y[x] + x*(1 + x^3)*Derivative[1][y][x] + x^2*Derivative[2][y][x] == 0,y[x],x]
✓ Maple : cpu = 0.083 (sec), leaf count = 53
dsolve(x^2*diff(diff(y(x),x),x)+(x^3+1)*x*diff(y(x),x)-y(x)=0,y(x))