>>> from polinomis import Polinomi

Suma
----

>>> p = Polinomi()
>>> p[3], p[1], p[0] = 2, -1, 4
>>> q = Polinomi()
>>> q[2], q[1] = -5, 7

>>> r = p + q
>>> r[3], r[2], r[1], r[0]
(2, -5, 6, 4)
>>> r.grau()
3

>>> p[4] = 6
>>> q[5], q[4] = -3, 2

>>> s = p + q
>>> s[5], s[4]
(-3, 8)
>>> all((r[i] == s[i] for i in range(4)))
True