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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 FX-991EX Advanced Engineering/Scientific Calculator (UK VERSION), Black : Amazon.co.uk: Stationery & Office Supplies
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Casio FX-991EX Classwiz Non-Programmable Scientific Calculator, 552 Functions with Menu Driven Interface, Black : Amazon.in: Office Products
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