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An example of a mathematical calculation : we want to compute roots of a complex numbers : i^^{(1/3)}, These are 3 roots. how to do ? Run RPNenh, type (0;1) ( this is i ) now, type 3, use the 1/x (to compute 1/3). and finally press the x^y key to get the result : { (0,866025…;0,5) (0,86602…;0,500000…) (0;1) }Now press this button to swap into smart display mode. Look, the result is now displayed like this : { (sqr(3)/2;1/2) (sqr(3)/2;1/2) (0.;1.) } Yeah ! in few keystrokes you get all roots (not only the first one like most other calulators). The 3 roots are : i and ( ± √(3)/2 ; 1/2 ) , that's correct. 