1. Resolva as expressões numéricas

a) 16+[10 - (18 ÷ 3 + 2) + 5] =?

b) 25 - [12 - (3 x 2 + 1)]=?

c) 45 + [(8 x 5 - 10 ÷ 2) + (18 ÷ 6 - 2)] =?

d) 50 - 2 x {7 + 8 ÷ 2 - [9 - 3 x (5 - 4)]} =?

obs: eu já fiz na escola a letra A​
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