Problem with integration

The del comes from not giving the 2nd arg to diff.  try diff(%,x) 
instead of diff(%).
RJF


Valerij Pipin wrote:

> Well,
> In macsyma there is another integrator to deal with transcendental functions
>  (C1) risch(3^log(x),x);
> 				       LOG(3) LOG(x)
> 				   x %E
>  (D1) 				   -----------------
> 				      LOG(3) + 1
> So, it's correct. However differentiation gives a delta
> (C2) diff(%);
> 			     LOG(3) LOG(x)     LOG(3) LOG(x)
> 		    LOG(3) %E		     %E
> (D2) 		   (---------------------- + ---------------) DEL(x)
> 			  LOG(3) + 1	       LOG(3) + 1
> (C3) factor(%);
> 				   LOG(3) LOG(x)
> (D3) 				 %E	         DEL(x)
> 
>