From: Albert_Rich@msn.com   
      
   A question was asked on [Rubi's Gitter chatroom](https://gitter.   
   m/Rule-Based-Integration/Lobby) about the difficulty of implementing the   
   utility routines Rubi 5 uses on a host CAS; in particular the Simplify   
   function.  I posted the following response:   
      
   The Simplify function of the host CAS is *not* critical to Rubi 5 producing   
   mathematically correct antiderivatives. It only affects how neat and tidy they   
   are.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)