Change:
Code:
%bet_ [ $+ [ $nick ] $+ ] _total

To:
Code:
$($+(%,bet_,$nick,_total),2)


If you really want to mess around with []'s, you can change it to:
Code:
%bet_ [ $+ [ $nick ] $+ [ _total ] ]


I didn't look closely, so there may be other issues, but there's the first problem I noticed.

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