Generate dynamic exclude table

Hi,

I am trying to generate a dynamic table shows the inverted result of a slicer.

In order to obtain this, I used the follow measures/tables:

The original table for which I am trying to make the inverted selection

Cars_table

Table for slicer

Unique_brand = SUMMARIZE('Cars_table','Cars_table'[brand])

List of all selected values

selection_list = 

VAR part_1 = CONCATENATE(UNICHAR(34),UNICHAR(44))

VAR part_2 = CONCATENATE(part_1, UNICHAR(34))

VAR core = CONCATENATEX(Unique_brand, [brand], part_2)

VAR with_lead = CONCATENATE(UNICHAR(34), core)

VAR with_tail = CONCATENATE(with_lead, UNICHAR(34))

RETURN with_tail

Table with result I want to obtain

Result_table= FILTER(

ALL('Cars_table'),NOT CONTAINSROW({selection_list}, 'Cars_table'[brand]))

However, the result table does not seem to interpret the 'selection_list'. There are no errors, but there is no filtering going on either...

Any help would be greatly appreciated.