Resposta:
[tex]a) {2}^{2} \times {2}^{6} = {2}^{8} \\ b){4}^{8} \div {4}^{4} - {3}^{3} \div 3 = {4}^{4} - {3}^{2} \\ = 256 - 9 = 247 \\ c){5}^{ - 8} = {( \frac{1}{5})}^{8} [/tex]
