\[1)\frac{7^{\backslash 5}}{12} - \frac{3^{\backslash 3}}{20} = \frac{35}{60} - \frac{9}{60} = \frac{26}{60} =\]
\[= \frac{13}{30}\ (ч) - на\ литературу.\]
\[2)\frac{7^{\backslash 5}}{12} + \frac{13^{\backslash 2}}{30} = \frac{35}{60} + \frac{26}{60} =\]
\[= \frac{61}{60} = 1\frac{1}{60}\ (ч) - всего.\]
\[Ответ:1\frac{1}{60}\ часа.\]