✓ Mathematica : cpu = 0.0236881 (sec), leaf count = 29
DSolve[a*b*x*y[x] + (b*x + a*y[x])*Derivative[1][y][x] + Derivative[1][y][x]^2 == 0,y[x],x]
✓ Maple : cpu = 0.012 (sec), leaf count = 22
dsolve(diff(y(x),x)^2+(a*y(x)+b*x)*diff(y(x),x)+a*b*x*y(x) = 0,y(x))