From: nma@12000.org   
      
   How is it possible that CAS can evaluate an integral   
   symbolically when it is definite, but not able to   
   when it is indefinite? This is all symbolic integration,   
   not numerical ofcourse.   
      
   Here is an example:   
      
   Assuming[Im[p] != 0, Integrate[1/(E^z^2*(p - z)),{z, -Infinity, Infinity}]]   
      
          (Pi*Erfi[p] - Log[-(1/p)] - Log[p])/E^p^2   
      
   But   
      
   Assuming[Im[p] != 0, Integrate[1/(E^z^2*(p - z)), z]]   
      
   Returns unevaluated.   
      
   I tried the above on Maple, but could not make it give same result,   
   it return unevaluated for both cases.   
      
   Mathematica 11.2   
      
   --Nasser   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)