Correct amendment to the following sentences, to remove multiple "AND"s [closed]

Solution 1:

(1) You can avoid the arguable garden-path effect here ( ... that weren't A and B and C) simply by adding a second 'that' (though the comma is arguably sufficient):

• Part of the brief was to create easy open plan spaces that weren’t clinical and cold, and that worked with a modern lifestyle.

(2) Here, the addition of a comma is certainly sufficient to show that the second 'and' is 'higher-level':

• Key to the success of the project was to create a house that felt easy and relaxed, and where none of the aesthetics felt forced.

The effect is to 'promote' the second 'and' to an obvious relative-clause-coordinator. Some might like

• Key to the success of the project was to create a house that felt easy & relaxed, and where none of the aesthetics felt forced.

But this is messy and better reserved for complex lists.

[References covering the disambiguation of different coordination levels of 'and' in various sentences, other than in lists, potentially extremely difficult to find.]