simp2 takes as argument two polynomials (or two integers see
2.8.6).
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 an irreducible representant of
this rational fraction.
Input :
^
3-1,x^
2-1)Output :
^
2+x+1,x+1]