|7| = 7; -7
|-111| = 111; -111
|13,14| = 13,14 ; -13,14
|2 supra 5| = 2 supra 5; -2 supra 5
|-2,(5) | = 2,(5); -2,(5)
|21| = 21; -21
|35| = 35; -35
|√18| = √18; -√18
|-√7| = √7; -√7
|-3√7| = 3√7, -3√7
|√100 supra 121| = √100 supra 121; -√100 supra 121
|-√6,25| = √6,25; -√6,25
|√2,56| = √2,56; -√2,56