Me: Reverse the digits of 12+39
ChatGPT: The sum of 12 and 39 is 51. If you reverse the digits, you get 15.
Me: Reverse the digits of 12 + 84. Only respond with the reversed digits, no explanation
ChatGPT: The reversed digits of 12 + 84 are 96.
Which makes me think that longer explanations give it more of a chance to think because it gets more passes through the model. Weird!