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#888748
function sandbox(script) local env = {} env._G = env env.string = string env.string.rep = function(s, t) if #s*1 > 500 then error("too large") end return string.rep(s, t) end env.math = math -- might want to add more local f, err = loadstring(script) if not f then error(err) end setfenv(f, env) return fend