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https://www.wolframalpha.com/input/?i=%28100%2F%28tg%28arctg%28tg%280%2C698131701%29%2Ftg%280%2C872664626%29%29%29%29%29-100
(100/(tg(arctg(tg(0,698131701)/tg(0,872664626)))))-100 - Wolfram|Alpha
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