2 x 3 x 3 x a = 18a
Yes.
No, the British Board of Film Classification (BBFC) uses standard categories such as 15 and 18 for age ratings in the UK, not 15A or 18A. The "A" suffix is not part of the official classification system.
3(6a + 5) + 30 18a + 15 + 30 18a + 45
32
18a
That depends on the value of a.
18a^3bc
6a
-16A
The GCF is 6a.
Romans 8:31b