Помогите плиз 5 пример и ,если сможете 4.

5)
$\frac{4 \frac{29}{31}- 4\frac{29}{31}}{7 \frac{2}{13}:4 \frac{5}{13}-2} = \frac{0}{{7 \frac{2}{13}:4 \frac{5}{13}-2}} =0$

4)
$\frac{8}{9}-(4 \frac{2}{7} -3 \frac{1}{7} : 1\frac{1}{2}) = \frac{8}{9}-(4 \frac{2}{7}- \frac{22*2}{7*3})= \\ \\ = \frac{8}{9}- \frac{30}{7} + \frac{44}{21} = \frac{56-270+132}{63}= -\frac{82}{63}= -1\frac{19}{63}$