Using the method of telescopic sums, how do I evaluate the following finite sums?

$\displaystyle S_1 = 3.2.3 + 3.3.4 + ... + 3(n+1)(n+2) + ... + 30906 using {n(n+1)(n+2)}$

$\displaystyle S_2 = 2/(1.2.3) + 2/(2.3.4) + ... + 2/(n(n+1)(n+2)) + ... + 2/(1030200) using {-1/(n(n+1))}$

Thank you