input: 
  def instantiate_vector3d(x: float, y: float, z: float) -> str:
      """Instantiate a 3D Vector with given x, y, z coordinates and return its string representation.
      >>> instantiate_vector3d(1.0, 2.0, 3.0)
      "(1.0, 2.0, 3.0)"
      >>> instantiate_vector3d(0.0, 0.0, 0.0)
      "(0.0, 0.0, 0.0)"
      >>> instantiate_vector3d(-1.5, 2.7, -3.0)
      "(-1.5, 2.7, -3.0)"
      """
      vector = Vector3D(x, y, z)
      return str(vector)
  
output:     return f"({x}, {y}, {z})"