input: Write a python function to calculate the result of the simplified_func for a list of numbers.
  assert calculate_simplified_func([1, 2, 3]) == [4, 18, 40]
  assert calculate_simplified_func([-1, 0, 1]) == [-6, -4, 4]
  assert calculate_simplified_func([0, 5, -5]) == [-4, 86, -104]
output: def calculate_simplified_func(numbers):
      def simplified_func(x):
          return x**3 + 2*x**2 + 3*x + 4
  
      return [simplified_func(x) for x in numbers]