Im supposed to find the derivative of the following two problems:

(a) f(x) = |(x+2)/(x-3)|

(b) f(x) = (1/(1+|x|))+(1/(1+|x-3|))

I have to mention my teacher just havent bother to teach how to derive of the absolute value... so if any one can also explain that to me greatly apreciated...

also if anything sounds weird im sorry but im talking math clases in spanish for the first time in long time.

thanx