Add punctuation: To change your user password as user
A: To change your 'user' password, as $ user :

Add punctuation: developed techniques superior to all others
A: ... developed techniques superior to all others.

Add punctuation: The very beautiful 2tone Star Chief is equipped with lots of chrome details in and outside the car and a beautiful continental kit
A:
The very beautiful 2-tone Star Chief is equipped with lots of chrome details in and outside the car and a beautiful continental kit.