CASIO CLASSWIZ fx-991SP X Iberia

[lrdheat]

I would go with the TI 30X Pro MathPrint. It is as fast as the 991EX. One can define a function f(x) and g(x)=d(f(x))/dx) in table, and use them in numeric solve, or in the home screen. On the CASIO, if you want to take a function from table, you have to retype the function in the home screen to then solve. The TI has all the functions of the CASIO, and also the ability to use max (function 1,function 2) in solve or table or home. The CASIO does offer spreadsheet while the TI does not. The CASIO DE version of the 991EX handles repeating decimals.