((d³ -8)/(d² -4) - 6d/(d+2)) : (1-4/(d+2))² = ((d-2)(d²+2d+4)/(d-2)(d+2) - 6d/(d+2)) : ((d+2-4)/(d+2))² =((d²+2d+4)/(d+2) - 6d/(d+2)) * (d +2)²/(d-2)²=(d² +2d +4 -6d)/(d+2)* (d +2)²/(d-2)² =(d² -4d+4)*(d+2)/(d-2)² =(d-2)²*(d+2)/(d-2)² =d+2.
Решение во вложениииииииииииииииииииииии
1)4221000000/100*86,4=3646944000
2)4221000000-3646944000=574056000
Ответ 574056000