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Resposta:
[tex]\left(\frac{1}{2}\right)\cdot \:2+\frac{2}{3}-3^{-2}\\\\\frac{1}{2}\cdot \:2+\frac{2}{3}-3^{-2}\\\\1+\frac{2}{3}-3^{-2}\\\\\frac{1\cdot \:3}{3}+\frac{2}{3}\\\\\frac{1\cdot \:3+2}{3}\\\\-3^{-2}+\frac{5}{3}\\\\-\frac{1}{9}+\frac{5}{3}\\\\-\frac{1}{9}+\frac{15}{9}\\\\\frac{-1+15}{9}\\\\\frac{14}{9}[/tex]