Translation of preocuparse

We spoke on Friday noon, I got your details through Vocabulix friends. That is similar to what you're teacher is using. It would be best if we could meet or communicate through phone or email.
It comes not only from the need to feel superior (which would be a legitimate and natural desire), it is also the consequence of ignorance, believe in stereotypes and old-fashioned intolerance.
I am glad for your help. I am sending you additional codes in the attachment. Please remove all codes that are without mistakes from the document and leave just the codes where you made changes.