code: def test_Laplacian():
      assert Laplacian(s3) == Laplacian(R.x**2 + R.y**2 + R.z**2)
      assert Laplacian(v3) == Laplacian(
          R.x**2 * R.i + R.y**2 * R.j + R.z**2 * R.k
      )
      assert Laplacian(s3).doit() == 6
      assert Laplacian(v3).doit() == 2 * R.i + 2 * R.j + 2 * R.k
      assert (
          srepr(Laplacian(s3))
          == "Laplacian(Add(Pow(R.x, Integer(2)), Pow(R.y, Integer(2)), Pow(R.z, Integer(2))))"
      )
  
imports: from sympy.vector import CoordSys3D, Gradient, Divergence, Curl, VectorZero, Laplacian
  from sympy.printing.repr import srepr
label_desc: Use image node_id 4 for calling a global function with example usage: test_Laplacian() without return types