How to hide a widget using display conditions on a specific page?

[Ferry]

Hi,
Looks like I'm making a mistake somewhere in the display condition.
I need to hide a widget from multiple pages, but nothing works.

If I use
Code:

$xf.reply.template !== 'whats_new'
it works.
But when trying to add another page nothing works
Code:

$xf.reply.template !== 'whats_new, whats_new_profile_posts'

What am I doing wrong?
How to hide a widget using display conditions on a specific page?

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