Replace character in a string with Ansible

Question 1

I have this Ansible as a String:

FUBAR={{ PREFIX }}_{{ CNAME }}{{ VERSION }}

1 2	FUBAR={{ PREFIX }}_{{ CNAME }}{{ VERSION }}

I want to replace all . in the concatenated string with '', like this:

FUBAR={{ {{ PREFIX }}_{{ CNAME }}{{ VERSION }} | replace('.','') }}

1 2	FUBAR={{ {{ PREFIX }}_{{ CNAME }}{{ VERSION }} \| replace('.','') }}

I get the message:

expected token ':', got '}'

1 2	expected token ':', got '}'

Could anyone give me a suggestion what’s wrong?

Question 2

FUBAR="{{ ( PREFIX + '_' + CNAME + VERSION ) | replace('.','') }}"

1 2	FUBAR="{{ ( PREFIX + '_' + CNAME + VERSION ) \| replace('.','') }}"

Resolving a few problems:

too many ‘{{}}’s
need quotes around the whole expression
the replace will only act on the last element unless it is all surrounded by ‘()’s

Question: