Meaning: considering everything that has happened. Taking everything into account.

Example Sentences:
1.- She may not be brilliant, but all in all I think she did quite well in her exams.
2.- All in all, it was a good trip; we enjoyed ourselves immensely despite the few difficulties we had to endure.

Meaning: get rid of all doubts and negative feelings. To clear any misunderstandings between two or more people.

Example Sentences:
They had a huge misunderstanding, but decided to clear the air by sitting together and discussing things frankly.

Meaning: bear in mind, consider, allow for. Remember to include something in one’s calculations

Example Sentences:
1.- I hope my teacher will take into account the fact that I was ill just before the examination when he evaluates my test paper.
2.- I hope they take her age into account when they judge her work.