Помогите решить пожалуйста пример 158

Решите задачу:

$\left[\left(4,625-\frac{13}{18}\cdot\frac9{26}\right):2\frac14+2\frac12:1,25:6\frac34\right]:1\frac{53}{68}\\1)\;4,625-\frac{13}{18}\cdot\frac9{26}=4\frac{625}{1000}-\frac12\cdot\frac12=4\frac58-\frac14=\frac{37}8-\frac28=\frac{35}8\\2)\;\frac{35}8:2\frac14=\frac{35}8:\frac94=\frac{35}8\cdot\frac49=\frac{35}2\cdot\frac19=\frac{35}{18}\\3)\;2\frac12:1,25:6\frac34=\frac52:1\frac14:\frac{27}4=\frac52:\frac54:\frac{27}4=\frac52\cdot\frac45\cdot\frac4{27}=\frac8{27}$
$4)\;\frac{35}{18}+\frac8{27}=\frac{105+16}{54}=\frac{121}{54}\\5)\;\frac{121}{54}:1\frac{53}{68}=\frac{121}{54}:\frac{121}{68}=\frac{121}{54}\cdot\frac{68}{121}=\frac{68}{54}=1\frac{14}{54}=1\frac7{27}$