RESOLVA. As expressões

a)
12² + 5² - 2³
144 + 25 - 8
169 - 8
161
b)
1000¹ - (6² × 10⁰)
1000¹ - (36 × 1)
1000¹ - 36
1000 - 36
964
c)
√100 ÷ √4
√100 ÷ 4
√25
5