Question 126575
{{{1/2x^-5}}}


{{{(1/2)(1/x^-5)}}}


{{{(1/2)(x^5)}}}


{{{x^5/2}}}


Your problem was that you shouldn't have taken the 2 up into the numerator.  Had the problem been:  {{{1/(2x)^-5}}}, then your answer would have been correct.