I am seeking the name of the female artist, album and song list of an
album.CD that contains some of the songs lyrics: " The angel inside
the house","2+2=5", "Still point of desire" and "Do it for love".

The CD you're looking for is "The Angel in the House," performed by
"The Story" (Jennifer Kimball and Jonatha Brooke). These are the songs
on the album:

So Much Mine 
Missing Person Afternoon 
The Gilded Cage 
When Two And Two Are Five 
At The Still Point 
The Angel In The House 
Mermaid 
The Barefoot Ballroom 
In The Gloaming 
Fatso 
Love Song 
Amelia 
Fatso, Part 2: Yo Estoy Bien Asi 

Jonatha Brooke: The Angel in the House
http://www.jonathabrooke.com/music/theangelinthehouse.php

These are the names of the songs that you've mentioned:

"The angel inside the house": "The Angel in the House"

"2+2=5": "When Two And Two Are Five"

"Still point of desire": "At the Still Point"

"Do it for love": "Mermaid"

You can purchase the CD from Amazon. You can also listen to clips from
all the songs here:

Amazon: The Angel in the House
http://www.amazon.com/exec/obidos/tg/detail/-/B000002HCQ

I hope this is helpful! If anything is unclear or incomplete, please
request clarification; I'll gladly offer further assistance before you
rate my answer.

Best regards,
pinkfreud

Excellent!  We found an old cassette tape with this wonderful music
but could not identify the artist, etc.  Many, many thanks, Pinkfreud!

I'm glad to have been able to help. Thank you very much for the five
stars and the nice tip!

If you like "The Story," you may want to check out Jonatha Brooke's
solo albums. You'll find some info about them on the first link that I
posted in my answer.

~pinkfreud