Answer:
-16c⁵/3
Explanation:
whenever exponents are separated by parentheses, multiply them
when dividing (and bases are the same), subtract exponents
anything raised to a negative exponent becomes a fraction with 1 in the numerator and the term goes in the denominator with a positive exponent
ex, 4^-1 equals 1/4; 3^-2 equals 1/9
[(-4)³·c^-4] ÷ 12c^-8
= -64c⁵/12
= -16c⁵/3