Polynomial

A polynomial is given as the product of first-degree binomials:} + \dots + b_{n-1} X + b_n.$$

Each term c X^k should be printed as follows:

• If c = 0, the term is omitted.

• If |c| = 1 and k > 0, only the sign of the coefficient $c$ is printed (for example, -X^3).

• If k = 1, the term is printed as $cX$ (without showing the degree).

• If k = 0, print only $c$.

• Otherwise, print c X^k (for example, 5 X^8).

Terms should be printed in decreasing order of the degree of $X$.The variable must be the uppercase Latin letter $X$.