\[\boxed{\mathbf{573\ (573).}\mathbf{\ }Еуроки\ - \ ДЗ\ без\ мороки}\]
\[\left( 3,6 - 1\frac{2}{3} \right)\ :\left( 4\frac{1^{\backslash 3}}{15} - 2\frac{7^{\backslash 5}}{9} \right) \cdot 2,6 =\]
\[= \left( \frac{36}{10} - 1\frac{2}{3} \right)\ :\left( 4\frac{3}{45} - 2\frac{35}{45} \right) \cdot \frac{26}{10} =\]
\[= \left( \frac{18^{\backslash 3}}{5} - \frac{5^{\backslash 5}}{3} \right)\ :\left( 3\frac{48}{45} - 2\frac{35}{45} \right) \cdot \frac{13}{5} =\]
\[= \left( \frac{54}{15} - \frac{25}{15} \right)\ :1\frac{13}{45} \cdot \frac{13}{5} =\]
\[= \frac{29}{15}\ :\frac{58}{45} \cdot \frac{13}{5} =\]