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Re:Integrated command line math by peter_l_downs on Tuesday July 23, 2013 @05:44PM (#6093128)
Or, if you're on OS X, you can just use Spotlight. It includes trig functions, factorials, exponents, etc, and it's only a command-space away. The only downside is that it doesn't automatically copy the result into your clipboard.

An example: http://i.imgur.com/vaN7HfS.png

Re:Integrated command line math by danielcorin on Tuesday July 23, 2013 @07:21PM (#6093549)
I'm surprised that pressing enter on the result in Spotlight doesn't copy it to the clipboard. Amusingly, it opens up the Calculator which I never need after getting the answer.