zz some shortcuts

http://mac.appstorm.net/roundups/productivity-roundups/10-essential-
productivity-apps-for-your-login-items/

1.quick math
在textedit里输入数学算式，然后选择，然后⌘+Shift+8，结果出来了...

2.save flv in safari
This one is a gem. Ever wanted to download a YouTube video to watch later? No
need to purchase third party applications or plugins, this feature comes built
right into Safari. Start the video in Safari and hit ⌘+Opt-a to bring up the
activity window. Then simply find the largest file (usually multiple MB) and
double click it. It’s as easy as that!

3.Search Google
Did you know OS X has an integrated global Google search feature? Just select
some text and hit ⌘+⇧+L to jump to the Google search results in Safari.
Nifty, no?