Question 33533
 the equation can be written as

    (x^-3 y^6 )^-1.  (^ means to the power )
  I've a doubt in ur question ,whether there is a positive r negative sign r nothin between 
 x & y..
  if there is no sign between them it is the product of  x&y,
       (x^-3 * y^6)^-1
i'll give u a very simple solution and other detailed solution..

the question says to simplify the expression and answer without negative exponents..
 
1. first simplify the expression within the bracket .
  we get,

       ((1/x^3 )*y^6)^ -1  (x ^ -3 can be written as inverse of x^3 making it positive expo.)
 then ,simplify again

            =(y^6/x^3)^-1
this is nothing but,the inverse..so the answer is

             = (x^3/y^6)


 2. ANOTHER SIMPLE SOLUTION IS JUST BRING THE NEGATIVE EXPO -1 INSIDE AND MULTIPLY WITH THE OTHER EXPO. INSIDE TEH BRACKET.
that gives u,
 x^3 y^-6
which is nothin but the x^3/y^6.

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priya