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expressions!!

55-[(5^2 x3)-5^2]
 
 
2^2 + {[1x(5-2)]x3

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Phillip R. | Top Notch Math and Science Tutoring from Brown Univ GradTop Notch Math and Science Tutoring from...
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you work from the inside out and exponents are evaluated first.
 
1.   55 - [75 - 25] = 55 - 50 = 5
 
2.   4 + [1 x 3] x 3 = 4 + 9 = 13