Writing a research paper I am a 16 years old high school student. I want to publish a new piece of work. Writing a research paper is quite difficult for me. If some body has any idea about how to do that then help me.
I am glad to know that you are interested in publishing a new piece of work in the field of mathematics. Here is what I would suggest: Look at institutions such as MIT RSI and PRIMES, as well as the Simons/Google/Intel science fairs, and also opportunities in your locality. Look at examples of mathematics reports submitted to them, and then copy that format and write your paper. It may be difficult to submit to an actual journal though for publishing. Academia is a bit brutal, and so it is better to work through the institutions that I mentioned. If your work is actually a breakthrough, then you will still be recognized, and these are good opportunities for students like you. 

If not, I would suggest emailing or getting in contact with a mathematics professor (possibly at your local university, and one who focuses in that area of mathematics), and talk to him. Ask him if he would be willing to look over it and send him what you have.