From: Albert_Rich@msn.com   
      
   On Tuesday, February 24, 2015 at 8:50:27 AM UTC-10, Nasser M. Abbasi wrote:   
      
   > fyi, Just trying Rubi 4.7 on this problem I saw   
   >    
   > Int[ x^2/(x Sin[x] + Cos[x])^2, x]  it did not give an answer.   
   >    
   > Wondering if a new rule is needed?   
      
   Yes, Rubi definitely needs a coherent set of rules for integrating expressions   
   involving monomials and trig functions.  I invite readers of this post to   
   contribute such a set.  Rubi is a totally open source system that I hope will   
   become a collaborative    
   effort implemented on a wide variety of computer algebra systems.   
      
   But right now, my efforts are focused on compiling Rubi 5.   
      
   Albert   
      
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