Help plotting Fourier Series expansion

I need to plot the Fourier Series over the interval t -pi:pi and m varying from 1,2,3,4 and 100 all on the same plot. Any help would be much appreciated

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer