CASIO fx-991CW

[Eddie W. Shore]

I tried the f(x) in the solver and I can confirm that the solver does not include the other variables with that method.

As I said before, I prefer the ALPHA key. I will go one step further and advocate that storage arithmetic (like the HP/Swiss Micros calculators) should be included. I think this is the most efficient way to do it.

When the Casios had the multistate command, storing calculations immediately terminated the entry:

pi^2/6 [ STO ] A (terminated)
A^2 / (A + 1)

Ans could be used:

pi^2/6: Ans^2/(Ans+1)

For the fx-115ES Plus (1st or 2nd Edition), we could use both Ans and PreAns.