CAS programs in user menu

[parisse]

The Xcas English documentation is indeed far from complete (unlike the French doc), as the Prime CAS documentation.
Some commands are functional, i.e. you must pass a function as argument, like makelist, matrix, apply, map. Some operators are functional, e.g. you can write f:=id-sin^2-1 and then compute f(2.0) or define g:=id-f/f' and compute (g@@4)(2.0). You can pass a function as argument to a CAS program. Take care not to confuse expressions and functions.