Here is the original item:
To stomach the cup of strong coffee that he desperately needed to keep awake.
Lawrence added seven packets of sugar and a quarter cup of cream.
You chose to remove the period after awake and connect the infinitive phrase to the main clause with no punctuation, like this:
To stomach the cup of strong coffee that he desperately needed to keep
awake Lawrence added seven packets of sugar
and a quarter cup of cream.
Unfortunately, you cannot connect these two parts in this manner. Review the rules.