PolEval(P, X) = Polynomial P evaluated at X

PolEval(P, X) = Polynomial P evaluated at X:

P is a column vector representing a polynomial and X is a scalar.
If P = {pn; p(n−1); ...; p2; p1; p0},
PolEval(P, X) = ((...((pn*X + p(n−1))*X + p(n−2))*X + ... + p2)*X + p1)*X + p0.

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