From: nma@12000.org   
      
   On 12/21/2019 6:01 PM, Nasser M. Abbasi wrote:   
      
   > It seems to only fail when the integrand   
   > is exactly the same as the variable of integration. ...   
   > If this is the case, it is not too bad then.   
      
   After more testing, this is not the case.   
      
   It fails in many other ways and on some basic ones.   
      
   So I will not try to add rubi-in-sympy at this time and   
   will wait for sympy 1.6 to try it.   
      
   >>> rubi_integrate(x*exp(x),x)   
   x*exp(x) - Integral(exp(x), x)   
      
   >>> rubi_integrate(x**2*exp(x),x)   
   Traceback (most recent call last):   
      File "/home/me/anaconda3/lib/python3.7/site-packages/sympy/po   
   ys/polyutils.py", line 212, in _parallel_dict_from_expr_if_gens   
        monom[indices[base]] = exp   
   KeyError: E**x   
      
   so rubi_integrate is not working at all in sympy 1.5. I do not   
   think it was even tested. May be resources were not there.   
   --Nasser   
      
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