Question 131404
SOLUTION - 
    
      (X^3 + X^2 + X + 1)/ (X^2 - 1)
  
      {X^2(X+1)+1(X+1)}/(X+1)(X-1)

      (X^2+1)(X+1)/(X+1)(X-1)

      (X^2+1)/(X-1)
   


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