The expression is .
(Definition of negative exponent)
(Evaluate power: )
The simplified expression is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=fa0e74bda6a8e87466c9d648b8a42344.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5bfd41386ffd45835777f6697ac8ce51.png\")
(Definition of negative exponent)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=13ec177225e79fc886e2792ed0a28db4.png\")
(Evaluate power: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=aadc4e2b3203ed968cb64697a1ca7cc6.png\")
)![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8d80f4f92d7a0f144087feb420d7e530.png\")
.