From: nma@12000.org   
      
   integral 2, in Welz_problems.txt input file is   
      
   integrate(1/2*(log(a*x - 1) - 2*log(-sqrt(a*x - 1)))/(pi*sqrt(a*x - 1)),x)   
      
   Q1) Why does Fricas 1.3.5 gives zero for the above?   
      
   ----------------   
   integrate(1/2*(log(a*x - 1) - 2*log(-sqrt(a*x - 1)))/(%pi*sqrt(a*x - 1)),x)   
       0   
         Type: Union(Expression(Integer),...)   
   -------------   
      
   Q2) The optimal antiderivative accoding to the input test files   
   is supposed to be   
      
           (-2*Sqrt[1 - a*x])/a   
      
   But differentating the above does not give back the integrand.   
   What Am I missing?   
      
      
   Thanks   
   --Nasser   
      
   Thank you   
   --Nasser   
      
   --- SoupGate-Win32 v1.05   
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