\
The expression is
.
\
(Apply formula:
)
\
\
\
(Simplify)
\
The sum is 11.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2f81828fc662e2e710bfa8eb8966dc9e.png\")
.![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=bb1840c05384372b12f49a08fc1de66b.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a8cb848352449812942f7fff2227685d.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3f5c7b67a4462a569f8bbdae9d95d011.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9329bda6008f536394bee76911478c41.png\")
(Simplify)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")