The above items might help you with these questions!
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An exponent is a small superscript number that tells you how many times a number is multiplied by itself. For example, if you have the number 4 and you want to multiply it by itself five times you could write it out as follows:
4 x 4 x 4 x 4 x 4 =
5 x 5 = 25 x 5 = 125
6 x 6 = 36 x 6 = 216 x 6 = 1296
125 + 1296 = 1421
53 + 64 = 1421