Jon Oaks
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by
Even with a nice calculator like the TI-34Multiview, some expressions can still be tricky to enter into the calculator.
http://content.screencast.com/users/Mallwalker52/folders/Jing/media/b17851b3-4550-497d-a4b7-808f14946576/jingswfplayer.swf
Jon Oaks 