Got ahold of a Casio fx-991ex and CG-50 to match my Classpad II. I'm really impressed with them but there is something about the fx-991ex... (see comments) : r/calculators
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What are the differences between CASIO Fx-991MS vs Fx-82ES PLUS ؟؟ and what is the best offering scientific calculator of CASIO overall? - Quora
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