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CASIO Classwiz Scientific Calculator FX-991EX, Computers & Tech, Office & Business Technology on Carousell
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Dave Jones on Twitter: "Casio FX-991EX Scientific Calculator Review: https://t.co/R2ElERlz4K via @YouTube" / Twitter
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Amazon.com: Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4" : Everything Else
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