public void testMath24() {
    String expression = "51 * 52 * 33 / 24 / 15 + 45 * 66 * 47 * 28 + 19";
    double val = 51d * 52d * 33d / 24d / 15d + 45d * 66d * 47d * 28d + 19d;
    System.out.println("Expression: " + expression);
    System.out.println("Expected Result: " + val);

    assertEquals(val, test(expression));
  }