Yesterday, the best answer is: -ceil(x^3). (Contributed by dnialh. Good Job!) Yesterday, the best answer is: -ceil(x^3). (Contributed by dnialh. Good Job!) dnialj solved the puzzle at 20:14:11.332; length: 12 dnialj solved the puzzle at 20:15:02.988; length: 10 dnialj solved the puzzle at 20:15:33.453; length: 10