Ma puteti ajuta la ex 8?

Răspuns:
a=3^(12n+3)•(2•3^2 + 4•3 - 14)
a=3^(12n+3)•(18+12-14)
a=3^(12n+3)•16
a=3^(12n+2)•16•3
a=3^(12n+2)•48 divizibil cu 48