divpc takes three arguments : two polynomials
expressions A, B depending on x,
such that the constant term of B is not 0, and an integer n.
divpc returns the quotient Q of the division of A by B by increasing power order, with degree(Q)≤ n or Q=0. In other words, Q is the Taylor expansion at order n of A/B in the vicinity of x=0.
Note that this command does not work on polynomials written as list of coefficients.