input: Write a python function to evaluate a polynomial at a given point using its coefficients.
  assert Polynomial([1, 0, 2])(3) == 19
  assert Polynomial([3, 0, 0, 2])(2) == 26
  assert Polynomial([1, 1, 1])(1) == 3
output: def Polynomial(coefficients):
      def evaluate(x):
          return sum(coef * (x ** i) for i, coef in enumerate(coefficients))
      return evaluate