Prime VS 48SX VS 42S/DM42/Free42

[lrdheat]

Downside to the CASIO is that it loses all information regarding a function of interest if the calculator mode is switched, or if the unit is turned off. The TI-30X Pro retains everything when turned off, or if mode is changed, and has similar speed to the CASIO. A function of interest can be defined in terms of f(x), and then referred to as f(x) in further calculations or in the solve app without having to retype the perhaps lengthy equation.