Press the flag The question requires a number answer and it is the blank in the equation. It then calculates the list of numbers based on that up to 64. The exponent list is the full list of exponents The numbers next to the exponent list are the square numbers The added numbers list shows all the numbers added together. Each new number has all the previous numbers added to it. The add variable is just the number with all the numbers added to it.
Thanks to the math book for making me curious. (I have no idea why I'm writing this)