\[ x^4 \left (-y(x)^2\right )+x^3 y'(x)+x^2 y(x)+20=0 \] ✓ Mathematica : cpu = 0.0902252 (sec), leaf count = 35
DSolve[20 + x^2*y[x] - x^4*y[x]^2 + x^3*Derivative[1][y][x] == 0,y[x],x]
\[\left \{\left \{y(x)\to -\frac {5 x^4-\frac {4 c_1}{x^5}}{x \left (x^5+\frac {c_1}{x^4}\right )}\right \}\right \}\] ✓ Maple : cpu = 0.314 (sec), leaf count = 26
dsolve(x^3*diff(y(x),x)-x^4*y(x)^2+x^2*y(x)+20 = 0,y(x))
\[y \left (x \right ) = \frac {5 x^{9}+4 c_{1}}{x^{2} \left (-x^{9}+c_{1}\right )}\]