Day before my exam. Writing/re-writing notes in Word.

I want to copy paste something and then all of a sudden these weird symbols pop up in my document and then spread to all of my word documents.


They look like this:
http://postimg.org/image/lamjvjeup/

What do I do to remove them?

Any help would be greatly appreciated - thanks in advance

Regards,
The-near-panicking student