CAS diff() giving incorrect results

[Albert Chan]

(09-23-2021 06:20 PM)Wes Loewer Wrote:  When I try (x^3)''(x = 4) it gives a warning and returns (6*x) = 24

(09-25-2021 04:04 PM)parisse Wrote:  f(x=...) will work if f is an expression. It will not work with e.g. (x^3)'' because the parser will not detect that it's an expression (and it will do like if it was implicit multiplication because x appears in both).

Why does older version detected the expression, but not newer version ?
Does this mean newer versions of HP Prime CAS support implied multiplication ?

It still does not explain Wes Loewer weird result.
Assuming parser get confused, assumed implicit multiplication, we should have:

CAS> (6*x) * (x = 4)       → 6*x^2 = 24*x