Find . Let the function is .
(Substitute )
(Subtract: )
(Substitute: )
Therefore, the function is .
The function is .
![\"\"](\"/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=0582fb628e4256e8fad99dbc24f76f11.png\")
. Let the function is ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7a05f093e26c3268aaf9c833697a37c8.png\")
.![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e6c67bf98eb9736c79fa49af076418a4.png\")
(Substitute ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7821dc34c7fd49c8cd5d9c8d6f65576a.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2715acf21e4f3c53c67c8d6818556108.png\")
(Subtract: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=3613d75b9e8fabcfb4681e9aaece5830.png\")
)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=df1d83da0613996de4805712d083ab3e.png\")
(Substitute: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=cc6418573a344866eeeba902329ae485.png\")
)![\"\"](\"http://www.mathskey.com/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=7a05f093e26c3268aaf9c833697a37c8.png\")
.![\"\"](\"/userfiles/image/steps_images/solution.JPG\")
.