\
The expression is
\
(Substitute
in original expression)
\
(Add:
)
\
The value of the expression is 4.5.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e3aa7ae3fad3042f073a85c779cdf0a8.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7a6d2a6811c0eee2bb093c4e4bf8a812.png\")
(Substitute ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5880b6b51b7d3969d9e056c1b39b0132.png\")
in original expression)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cccf39c2b213c00c1dc060b483f6e6f6.png\")
(Add: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9ba00983af9b880f41552edb1837d203.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")