Ответ:

[tex] \frac{ \frac{26}{3} + \frac{5}{8} - 5 \frac{2}{3} }{ \frac{17}{2} - \frac{23}{4} } = \frac{ \frac{26}{3} + \frac{5}{8} - \frac{10}{3} }{ \frac{11}{4} } = \frac{ \frac{143}{24} }{ \frac{11}{4} } = \frac{13}{6} = 2 \frac{1}{6} [/tex]