<PRE><B>Question 31756</B>
{{{ -3(-4x^-6)^-2 }}}
First, realize that there is an understood power of +1 associated with the -4
When working Power to Power we multiply the powers
{{{ -3(-4^(-2)x^12) }}}
Remember that anything over 1 equals itself.  put this all over one
{{{ (-3(-4^(-2)x^12))/1 }}}
The -4 has a negative exponent ... move it to the other side of the fraction, and turn ONLY the exponent positive
{{{ (-3x^12)/(-4)^2 }}}
Work the expontent
{{{ (-3x^12)/16 }}}</PRE>