From: nma@12000.org   
      
   On 7/17/2016 4:17 PM, Dr Huang wrote:   
   > what is result of integrate(x*f(x),x)=?   
   > wolfram, sagemath, sympy, integral calculator cannot. can your software ?   
   >   
   > DrHuang.com   
   >   
      
   I am not sure what the expected result should be   
   without knowing what f(x) is. But you could try   
   integration by parts:   
      
   ------------------ Maple -------   
   int0:=Int(x*f(x),x);   
   IntegrationTools:-Parts(int0,x);   
   ---------------   
      
      (int(f(x), x))*x-(Int(int(f(x), x), x))   
      
   --- SoupGate-Win32 v1.05   
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