Question 31119
{{{-3(-4x^-6)^-2}}} = {{{-3(1/-4x^6)^-2}}} = {{{-3(1/(1/-4x^6))^2}}} 
= {{{(-3/1)((-4x^6/1)^2)}}} = {{{(-3/1)((-16x^12/1))}}} = {{{48x^12}}}

see:
http://whyslopes.com/etc/ThreeSkillsForAlgebra/ch18G.html
and
http://www.sosmath.com/algebra/logs/log3/log33/log33.html