Question 9224
  {{{6^-2y^3z^-2/-2x^4y}}}

  If a negative exponent is there, it can be converted into a positive one by  
  bringing the base as denominator and the negative exponent as positive.  For
  example, {{{x^-4}}} can be written as {{{1/x^4}}}. In the same way, the nos.
  having negative index should be first converted as positive indices.

  So {{{6^-2y^3z^-2/-2x^4y}}}
  
  =  {{{1/6^2}}}*{{{y^3/1}}}*{{{1/z^2}}}/{{{-2x^4y}}}

  =  {{{1/6^2}}}*{{{y^3/1}}}*{{{1/z^2}}}*{{{1/-2x^4y}}}
  
  =  {{{y^3/36z^2}}}*{{{1/-2x^4y}}}

  =  {{{y^2/-72x^4z^2}}}     Answer.

  I hope this is clear to you.


gsm