The expression is .
Remove parentheses and group like terms together.
Combine like terms.
.
The solution is .
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f3c35eaf8541f25e3a8e186601765bc4.png\")
. ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a5edadd469f678c741d467d5fd84d664.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ff671f9a9ded87e5d4a3d30cc350f9a9.png\")
.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0dd6b17c8473b7915673ed0598a2cf65.png\")
.