Solved options:

[FUZIK]

server: 1.12.1
skript: 2.2-dev29 of bensku

not work:

Spoiler: broadcast "1 and -1"

options:
    integer: 10
    formula: ({@integer} + 1) and ({@integer} - 1)
command formula:
    trigger:
        add {@formula} to {_formula::*}
        broadcast "%{_formula::*}%"

work:

Spoiler: broadcast "11 and 9"

options:
    integer: 10
command formula:
    trigger:
        add {@integer} + 1 and ({@integer} - 1) to {_formula::*}
        broadcast "%{_formula::*}%"

 

[ShaneBee]

I believe you would need a separate option for ({@integer} - 1). Unable to test but try

options:

    integer: 10
    formula: ({@integer} + 1)
    formula2: ({@integer} - 1)
    
command formula:
    trigger:
        add {@formula} to {_formula::*}
        add {@formula2} to {_formula::*}
        broadcast "%{_formula::*}%"

 

[ShaneBee]

options:
    integer: 10
    formula: ({@integer} + 1) and ({@integer} - 1)
command formula:
    trigger:
        loop {@formula}:
              add loop-value to {_formula::*}
              broadcast "%{_formula::*}%"

thanks for all.

 

[ShaneBee]

Зачем тебе это, лол?