simplifying exponential expressions?

Question

1. (8b^3/c^3)^2(b^2c/4)^2

2. (12a^-2b^-2c^6/36a^-2c^7)^-3(a^-2b^5/3b^4c^3)^2

Answer 1

use these two formulas
x^m *x^n = x^(m+n) and (x^m)^n = x^m*n

=64b^6/c^6 * b^4c^2/16
=4b^10/c^4