Properties Of Formal Academic Writing Style

I have found large number of students asked me about principles and characters of formal academic writing,So I'm going to tell you some useful hints.Please pay attention

1-Avoid using phrasal verbs.
e.g break up,drop out,.............

2-Avoid chatty style

3-It is very important to use passive voice.

e.g It is often said, It can be seen,.........

4-Do not use contraction.
e.g It's false
It is true

5-Avoid exaggeration.

6-Avoid using idioms

7-Use precise word.