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HELP! My Casio fx-991EX's display suddenly glitched and mirrored. How to fix/what seems to be the cause? : r/calculators
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Original CASIO FX-991EX Advanced Scientific Calculator 552 Functions Engineering Students High School Lab Office Solar - Battery
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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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