public void testMath31() {
    String expression = "40 / 20 + 5 - 4 + 8 / 2 * 2 * 6 ** 2 + 6 - 8";
    double val = 40f / 20f + 5f - 4f + 8f / 2f * 2f * Math.pow(6, 2) + 6f - 8f;
    assertEquals(val, MVEL.eval(expression));
  }