Solve the following: Simplify

1) [(2^2)^3 x 3^6] x 5^6

2) 8^2 ÷ 2^3

3) 12^4 x 9^3 x4 / 6^3 x 8^2 x 27

4) 2^3 x a^3 x 5a^4

5) (3^0+2^0) x 5^0​