Номер 10 и 11 !!!!!!!!!!!

Решите задачу:

$- {x}^{5} - x^{2} + 5x^{7} - 8x^{10} \\ = - ( - 1 {)}^{5} - ( - 1)^{2} + 5. { (- 1)}^{7} - 8. {( - 1)}^{10} \\= - - 1 - 1 - 1.5 - 1.8 \\ = + 1 - 1 - 5 - 8 \\ = - 13$

$\frac{ {2}^{14} . {5}^{6} . (\dfrac{5}{10} ) ^{13} }{ {5}^{4} } \ \ \\ = {2}^{14} . {5}^{2} . (\frac{1}{2} ) ^{13} = \\ = {2}^{14} . {5}^{2} . ( {2}^{ - 1} ) ^{13} \\ = {2}^{14 - 13} .25 \\ = 2.25 \\ = 50$

$\mathtt{iyi dersler}$