\
\
The expression is
\\
\
(Substitute;
)
\
First operation is addition
\
(Add;
)
\
(Add;
)
\
\
The valu of espression is
\
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=39e1f9a79255da6e0314e4e41e4c0883.png\")
\\
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=70fc179a3accd68c9ff036de046cfac2.png\")
(Substitute;![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=b6f460230e5f717b490f3848bc43308a.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=59cf37989f3cd9033f4d4a0a490e4d93.png\")
(Add;![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=a8301adde6682090c1b3e8566a2f0a89.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9c399b5f43a65398101b05257d773749.png\")
(Add;![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=637f0966f7943f479645603c9ba226d5.png\")
)![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=46dffacddd1620bf16b27648692b4624.png\")