\[\left( \frac{2}{3} \right)^{- 1} + ( - 1,7)^{0} - 2^{- 3} =\]
\[= \frac{3}{2} + 1 - \left( \frac{1}{2} \right)^{3} =\]
\[= \frac{3^{\backslash 4}}{2} + 1^{\backslash 8} - \frac{1}{8} = \frac{12 + 8 - 1}{8} =\]
\[= \frac{19}{8} = 2\frac{3}{8}\]