 
 
 
propfrac takes as argument a rational fraction.
propfrac rewrites this rational fraction as the sum of its
integer part and proper fractional part.
propfrac(A(x)/B(x)) writes the fraction A(x)/B(x) (after 
reduction), as :
| Q(x)+ | 
 | where R(x)=0 or 0≤ degree(R(x))< degree(B(x)) | 
Input :
Output :
 
 
