I don't know which buttons I have to click or what key combination to type to calculate a cube root.
The n-th root is calculated when you put a subscript number before the square root sign.
To enter subscript numbers with the keyboard hold down Alt while entering the number.
- Go to Advanced mode
- Press Alt while typing 3
- Press √
and so on
Open Calculator and goto Help>Contents (or simply press F1), You will find help for Powers and Roots:-
Where you will find information that:
n-th roots can be calculated by putting a subscript number before the root sign.
The superscripting and subscripting numbers can be put by holing Ctrl and Alt respectively!.