Final answer:
Exponential abbreviations can be rewritten as multiplication problems.
Step-by-step explanation:
a. 2² can be rewritten as 2 x 2, which equals 4.
b. 84 is not an exponential abbreviation, so it doesn't need to be rewritten.
c. 123 is also not an exponential abbreviation.
d. 205 is not an exponential abbreviation either.
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