 
 
 
simp2 takes as argument two polynomials (or two integers see 
5.8.6).
These two polynomials are seen as the numerator and denominator
of a rational fraction.
simp2 returns a list of two polynomials seen as the numerator
and denominator of the irreducible representation of
this rational fraction.
 Input :
^3-1,x^2-1)Output :
^2+x+1,x+1] 
 
