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How to reset a scientific calculator - Quora
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My FX-991EX seems to be stuck. It's not taking any inputs and not responding to reset button. : r/calculators
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How to reset a Casio calculator - Quora
How to Reset a Casio FX 991ES PLUS - YouTube
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Reset Casio fx-991 ES PLUS (Step-by-Step Guide) - YouTube
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![How to reset Casio fx-991ES Plus - Calculator tricks [Examination - 2020] - YouTube](https://i.ytimg.com/vi/wXgJ2NXgn00/maxresdefault.jpg "How to reset Casio fx-991ES Plus - Calculator tricks [Examination - 2020] - YouTube")