You can put this solution on YOUR website! x-{x-1-[x-2-(x-3-{x-4-[x-5-(x-6)]})]}
x-{x-1-[x-2-(x-3-{x-4-[x-5-x+6]})]}
x-{x-1-[x-2-(x-3-{x-4-1})]}
x-{x-1-[x-2-(x-3-{x-5})]}
x-{x-1-[x-2-(x-3-x+5)]}
x-{x-1-[x-2-2]}
x-{x-1-[x-4]}
x-{x-1-x+4]}
x-3
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Cheers,
Stan H.