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 =
8 x 8 = 64
2 x 2 = 4 x 2 = 8
64 + 8 = 72 - 14 = 58
82 + 23 - 14 = 58