[Skript] Calculator

command /c <text> [<integer>] [<text>] [<integer>]:
    permission: calculator.use
    description: Use a calculator
    usage: &c/c [c/u] (number) (+/x/-) (number)
    trigger:
        if argument 1 is not "c":
            if argument 1 is not "u":
                message "&c/c [c/u] (number) (+/-) (number)"
                stop
        if argument 1 is "c":
            message "<light green>Calculator cleared"
            set {Calculator.%player%} to 0
            stop
        if argument 3 is not "+":
            if argument 3 is not "x":
                if argument 3 is not "-":
                    message "&c/c [c/u] (number) (+/x/-) (number)"
                    stop
        if argument 2 is not set:
            message "&c/c [c/u] (number) (+/x/-) (number)"
            stop
        if argument 3 is not set:
            message "&c/c [c/u] (number) (+/x/-) (number)"
            stop
        if argument 4 is not set:
            message "&c/c [c/u] (number) (+/x/-) (number)"
            stop
        if argument 1 is "u":
            if argument 3 is "+":
                add argument 2 to {Calculator.%player%}
                add argument 4 to {Calculator.%player%}
                message "<Light green>%{Calculator.%player%}%"
                stop
            if argument 3 is "-":
                add argument 2 to {Calculator.%player%}
                remove argument 4 from {Calculator.%player%}
                if argument 4 is greater than argument 2:
                    message "<light red>Number 1 must be bigger than number 2"
                    stop
                message "<Light green>%{Calculator.%player%}%"
                stop
            if argument 3 is "x":
                loop argument 4 times:
                    add argument 2 to {calculator.%player%}
                    add 1 to {Calculator.%player%.x}
                    if {Calculator.%player%.x} is argument 4:
                        set {Calculator.%player%.x} to 0
                        message "<light green>%{Calculator.%player%}%"
                        stop