Shortcut Keys
Enter : Evaluates your input
Ctrl+Enter : Evaluates your input numerically
Alt+Enter : Checks your input but does not evaluate it
The following shortcuts are valid in other view.
Alt+a/option+a --- α
Alt+e /option + e --- Napier's constant
Alt+i/option+i --- Imaginary unit
Alt+p/option+p --- Pi
Alt+2/option+2 --- Square