Question 432092
Moving from
denominator to numerator
and 
numerator to denominator
"flips" the sign of the exponent
.
For example:
if you had:
{{{a^(-b)}}}
this is equivalent to:
{{{1/a^b}}}
.
So, if you started with (I'm assuming the exponent is with the denominator only!):
{{{ 2/3^(-2) }}}
{{{ 2/(1/3^2) }}}
{{{ 2*3^2 }}}
{{{ 2*9 }}}
{{{ 18 }}}