CASIO CLASSWIZ fx-991EX

[lrdheat]

The 991EX definitely accepts longer equations in textbook entry mode than the 991ES. EX also faster on integration. EX sacrificed GCD, LCM, product of equation from x=? to x=?. New is spreadsheet and ratios, and QR code to transmit data to produce graph on smartphone/tablet. Don't know how much control and analysis is available for graph produced...