\
The expression is
.
\
\
(Cancel common terms)
\
The value expression is
.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=5cc088b316e11e07757e53106ff890a0.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=f02bafea4837d49f7338ddc2272e77b3.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=10efcd14e1942876a6521f136d9eb913.png\")
(Cancel common terms)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2905317f95d06bd32f0a197eef35c176.png\")
.