The expression is
(Substitute in given expression)
(Product of two same signs is positive)
(Multiply: )
The value of the expression is 120.
![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/step1.JPG\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ebc6ae09ca4bab564d79cad3d88a9343.png\")
![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=2e544c8a868eba040287b7ac64f58fd9.png\")
(Substitute ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=e87ce5cd2b2478d5f9695cf455fd88b7.png\")
in given expression)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=951f4e422c1c3c0b18a16d1c810935d5.png\")
(Product of two same signs is positive)![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=dd0ec45b968272929b4aaf67bb488a9d.png\")
(Multiply: ![\"\"](\"/test/fckeditor/editor/plugins/fckeditor_wiris/integration/showimage.php?formula=ac0a6c4af2d4a8b60ea2730d0306e962.png\")
) ![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")