Another instructions for the manipulation of algebraic exprs

[compsystems]

Hello BP.

For those who start in computer-assisted mathematics, the CAS should provide instructions for the manipulation of algebraic expressions, for this reason I have proposed pre-included trivial functions.

this reflection is for you to please incorporate some of the functions shown in the following screenshot of the calculator casio classpad 300/400



1: Transpossion of terms (Exchange), from right to left and vicersa
2: ABSexpand with a better name
3: another function that you detect from the previous image that is not in Xcas



Thanks
Jaimeza

[parisse]

I don't see why a command like exchange is really useful to teach algebra to pupils, it's much easier to select a part of an equation and press Ctrl-right or leftarrow. Perhaps exchange might be interesting for someone implementing a symbolic program, but then it's straighforward to implement, it does not require a builtin command.