The expression is .
Simplify the expression.
(Original expression)
(Rewrite the expression)
(Substitute: )
The simplified expression is .
.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=8c6077fc5b175a42f67f2f2a6e4ddf98.png\")
. (Original expression)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=52718c9117deb1381186646060e6b9bb.png\")
(Rewrite the expression)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bc20a36b6315699e917aaeb8457a7788.png\")
(Substitute: ![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d38a5ef9a3410dcfab1fe85ffd0e7410.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f2fd6cbe9c7b2934f9ee3a3f8564f729.png\")
(Substitute: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4d14a000b18062e767f392b326942f99.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=15c6a205b3d7bf613d3ffa67edae4083.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=d79047d86e1c0c96b4f84d8120fdd4a9.png\")
.