public void testMath28() {
    String expression = "50 + 30 + 80 + 11 ** 2 ** 2 * 51";
    double val = 50 + 30 + 80 + Math.pow(Math.pow(11, 2), 2) * 51;
    Object result = test(expression);

    assertEquals((int) val, result);
  }