Calculator with naughty

[Barkat]

 Hi,

please help me to edit this so display output can be via naughty or notify-send
I tried few things but din't work.


Anrxcs Calculator Prompt

-- Prompt menus
-- ...
-- ...
-- ...
awful.key({ modkey }, "F11", function ()

    awful.prompt.run({ prompt = "Calculate: " },
mypromptbox[mouse.screen].widget,
        function (expr)
            local xmessage = "xmessage -timeout 10 -file -"
            awful.util.spawn_with_shell("echo '" .. expr .. ' = ' ..

                awful.util.eval("return (" .. expr .. ")") .. "' | "
.. xmessage, false
            )
        end)
end),



-- 
Regards,
Barkat.