Remove multiple elements from a list [COMMON LISP]

Question

I want to remove several elements from a list and return the list without these elements.

(defun removeAll (lista1 lista2)
 .
 .
 .
)

Entrada: > (removeAll '(a b c) '(a b c d))

Saída; > (d)

I’ve given it a lot of thought and I haven’t been successful.

Answer 1

I found a solution in Stackoverflow gringo, follow link: https://stackoverflow.com/questions/46574567/lisp-how-to-remove-list-of-elements-from-list

Using the function SET-DIFFERENCE

Entrada: > (set-difference '(a b c d) '(b c))
Saída: > (a d)