From: nma@12000.org   
      
   Why FriCAS gives zero on this integral?   
      
                          FriCAS Computer Algebra System   
                                Version: FriCAS 1.3.6   
                     Timestamp: Mon 09 Mar 2020 12:35:03 PM CDT   
      
   (1) -> integrate(cos(x)*cos(2*x)*sin(3*x)/(-5+4*sin(x)^2)^(5/2),x)   
      
       (1)  0   
      
   This is #425 in Timofeev test suite. No error or any other message is given.   
      
      
      
   The optimal anti according to Rubi's input files is   
      
   -1/(4*(-5 + 4*Sin[x]^2)^(3/2)) - 5/(8*Sqrt[-5 + 4*Sin[x]^2]) + Sqrt[-5 +   
   4*Sin[x]^2]/8   
      
      
   --Nasser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)