Sorry, but there is no way to tell what 3^3^333 or (3)^(3)^(333) mean. You MUST either write (3^3)^333 or 3^(3^333), not 3^3^333, and not (3)^(3)^(333) Look at these two examples. If you write 2^3^4, there is no way to tell whether this means (2^3)^4 or 2^(3^4). They are NOT the same because: (2^3)^4 = 8^4 = 4096 but 2^(3^4) = 2^81 = 2417851639229258349412352 So you must put parentheses to show whether you are associating the first two numbers or whether you are associating the last two numbers. Edwin