\
The expression is
.
\
(Substitute
a
= 4)
\
(Add:
)
\
The value of the expression is
.
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=c4892b6d8e33b7cc22da7ff663f7a551.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=803bc7d75224cc9bcfa0d0a18c9369a0.png\")
(Substitute a = 4)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0183f4c8457fec70d627a1cb8f7b37e0.png\")
(Add: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=eb2a588fb74245d27c91cf99b7438cd3.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2c293a50ce69ee4380f958695a238f24.png\")
.