SIMPLIFY THE FOLLOWING
3.25 – 1/2{5 + 4 - (3 + 2 – 1 + 3)}
4. 27 - [38 - {46 - (15 - 13 - 2)}]
5. 36 - [18 - {14 - (15 – 4 ÷ 2 x 2)}]
6. 45 - [38 - {60 ÷ 3 – (6 - 9 ÷ 3) ÷ 3}]
7. 23 - [23 - {23 - (23 - 23 - 23)}]
8. 2550 - [51 0 - {270 - (90 - 80 + 70)}]
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