58. Вычислите: \(2\frac13:\left(\frac58-\frac83\right)+2\cdot1\frac37\).

\[2\frac13=\frac73,\quad \frac58-\frac83=\frac{15-64}{24}=-\frac{49}{24},\quad 1\frac37=\frac{10}{7}.\]

\[\frac73:\left(-\frac{49}{24}\right)+2\cdot\frac{10}{7}=-\frac87+\frac{20}{7}=\frac{12}{7}.\]

Ответ: \(\frac{12}{7}=1\frac57\).