Mary did the following problem
57-6^2 + (10+2)
57 - 6^2 + 12
57-36+12
57-48
9
Which of the following statements are true?
It is wrong because 6 2 is 12.
It is correct.
It is wrong because the subtraction should have been done before the addition.
It is wrong because 57 - 48 is 11
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