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>>> p = poly1d([3,4,5])

>>> print p

   2

3 x + 4 x + 5

>>> print p*p

   4      3      2

9 x + 24 x + 46 x + 40 x + 25

>>> print p.integ(k=6)

 3     2

x + 2 x + 5 x + 6

>>> print p.deriv()

6 x + 4

>>> p([4,5])

array([ 69, 100])