what is solution of y'''-4 y' -2 y' y =0 ? how to test it by online software?
wolfram solution is very complicated, so we cannot test it .

it has a very simple solution: http://server.drhuang.com/input/?guess=dsolve%28ds%28y%2Cx%2C3%29-4ds%28y%29-+2ds%28y%29*y%29

mathHand.com

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)