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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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Casio ClassWiz FX-87DE X - School Technical Scientific Calculator (593 Functions, QR Code Function, LC Display), German Language, Black : Amazon.co.uk: Stationery & Office Supplies
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Casio Classwiz FX-991EX / FX-570EX - Casio Scientific Calculator, Hobbies & Toys, Stationary & Craft, Stationery & School Supplies on Carousell
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Original Casio FX-991EX 552 Function Scientific Calculator Advanced Calculator With Intelligent Design - AliExpress
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Casio CLASSWIZ FX-991CW Advanced Engineering Scientific Computer (FX-991ES PLUS2 -> FX-991EX -> FX-991CW)
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