From: nma@12000.org   
      
   On 10/27/2017 1:03 AM, Albert Rich wrote:   
      
   > If the proposed antiderivative is so big it blows the default system stack   
   when recurring through it, that "wallpaper" result is essentially worthless   
   and should be given a D.  So before calling the grading function, check the   
   expression size.  If it    
   is huge, skip the grading function, and give the result a D (or a B or C if   
   you prefer).   
   >   
   > Albert   
   >   
      
   Thanks. I allready made this change now. Check if leaf size   
   is "too large" before grading, but give it grade "B", since   
   that is what I did for Mathematica allready. This was arbitrary   
   choice.   
      
   The integral in example I just showed had anti-derivative of leaf size:   
      
                    17,767,395   !!   
      
   But this only affects few integrals any way (may be 10-30 out   
   of 15,000). Depending on the version.   
      
   So it has almost no effect on the overall result stats allready posted.   
      
   I am re-running all Maple tests now, and so far, no hangs after this   
   change.   
      
   --Nasser   
   ps. we do not have grade "D". Only A,B,C and F. Those integrals in   
   the hanged list all had "F" grade but now they will change to be "B".   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)