\
The expression is
\
(Replace
a
with 9)
\
(Subtract:
)
\
The value of the expression is 4.
\
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=4c2fea683b435fbd2d77fbc30ed9f0b4.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=9040076120a9e15b09d79a471b55dc16.png\")
(Replace a with 9)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=962cee740d5fd9db1dfcb4ec34098e6a.png\")
(Subtract: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ee9601c60c7cb6dc057485dc66474767.png\")
) ![\"\"](\"/userfiles/image/steps_images/solution.JPG\")