My first try in writing mathematical formula in this blog

Fascinated by a way to write formula in blogspot.com, here's my very first.
The codes used are based on the LATEX and simulated via java extension file installed in this blog. ^_^
 $latex \displaystyle S(n)=\sum_{k=1}^{n}{\frac{1}{T_{k}}=\sum_{k=1}^{n}{\frac{6}{k(k+1)(k+2)}$