[Finite Maths] Derivative Problems

Hey guys. I'm a newbie here and if this thread is in the wrong place please forgive me. I didn't know where to post derivative questions, so I figured this place would be the most logical.

I was going through the review questions I had to complete, and off all the 25 examples, Y'm seriously stuck on a few.

I'm supposed to find the derivatives of the following questions:

1- f(x) = (e^x + e^-x) / (e^x - e^-x )

2- g(x) = e^3x-1 . e^x-2 . e^x

3- f(x) = 1 / x ln x

Solving any of them is still a big help, and I'd appreciate it if you could show your workings so I could at least understand what you did and why.

Thanks a lot :)