\[\left( 31 - 14\frac{7}{15} \right) - \left( 27\frac{2^{\backslash 4}}{3} - 19\frac{3^{\backslash 3}}{4} \right) =\]
\[= 16\frac{8}{15} - \left( 26\frac{20}{12} - 9\frac{9}{12} \right) =\]
\[= 16\frac{8^{\backslash 4}}{15} - 7\frac{11^{\backslash 5}}{12} =\]
\[= 16\frac{32}{60} - 7\frac{55}{60} =\]
\[= 15\frac{92}{60} - 7\frac{55}{60} = 8\frac{37}{60}\]