Question 195030
 ( 2xy^-3 )  ( 3 x^-1 y^4 )
.
(  2x/y^3)  ( 3 y^4 / x^1 )
.
2*3* x/x * y^4/y^3
.
  6 * y  ,,,,,,ANSWER
.
  checking,  let  x=1,  y=2,,subst  in  original  and  answer,  both  give  12 ,,,ok