((4,625-13/18*9/26):2 1/4+2 1/2:1,25: 6 3/4):1 53/68 помогитеее

1. (13/18)*(9/26)=0.25 2. 4.625-0.25=4.375 3. 2 1/4=9/4 4. 9/4=2.25 5. 4.375:2.25=(35/18)  6. 2 1/2=5/2 7. 5/2=2.5   8. 2.5:1.25=2 9. 6 3/4=27/4    10. 27/4=6.75 11. 2:6.75=(8/27) 12. (35/18)+(8/27)=(121/5413. 1 53/68=121/68) 13. 1 53/68=121/68 14. (121/54):(121/68)=(34/27)