[tex] ( - 1)^{4} + \frac{2}{3} \times ( \frac{1}{3} - \frac{5}{6} \div \frac{5}{3} ) =
1 + \frac{2}{3} \times ( \frac{1}{3} - \frac{5}{6} \times \frac{3}{5} )=
1 + \frac{2}{3} \times ( \frac{1}{3} - \frac{1}{2} ) =
1 + \frac{2}{3} \times ( - \frac{1}{6} ) =
1 + ( - \frac{1}{9} ) =
\frac{8}{9} [/tex]
