input: 
  def create_3d_vector(x: float, y: float, z: float) -> str:
      """Creates a string representation of a 3D Vector with given coordinates x, y, z.
      >>> create_3d_vector(1.0, 2.0, 3.0)
      '(1.0, 2.0, 3.0)'
      >>> create_3d_vector(0.0, -1.0, 5.0)
      '(0.0, -1.0, 5.0)'
      """
      return "(" + str(x) + ", " + str(y) + ", " + str(z) + ")"
  
output:     return f"({x}, {y}, {z})"