input: def parse_numerical_expression(expression: str) -> float:
      """
      Parses a string containing a numerical expression and returns the result.
      
      >>> parse_numerical_expression("2 + 3 * (4 - 1)")
      11.0
      >>> parse_numerical_expression("10 / 2 + 3")
      8.0
      """
      return eval(expression)
output:     return eval(expression)