End or Finish? Can you please explain when we use "end" and when we use "finish"?

And here we go to the high school In my country,there is still 2 days till school's start. And to be honest it's not something that I was waiting for. I mean,who really likes to go to school? But no,it's not about studying.I'ts about my classmates... I really don't want to meet them again. Last year when I was on the third level of junior high school,a new girl entered our class. After a month of school year she started to talk about her boyfriend,and surly all of the class got impressed and went to her. These stuffs weren't interesting for me,so I got a little far from them. A day one of my classmates who was that new girl's best friend came to me and said''You are with out of any feelings''I wondered why she said like this so I asked"why?" and I got "You never talk to anyone and when we tell you something,your reaction is nothing". After that day they gave me a name:Walking dead. I can't hide that i got a little sad,and i didn't really like that name,but...You know what? it's okay.At least I didn't get pervert :D

English mathematic? hi all! can you please help me and tell me How u say math signs in English? For example: +plus