I'm having a hard time with some problems and can't seem to come up with anything that will work. I have a pre-calc final 2 hours, please help!

1. Perform the following operations and reduce to simpliest form: --My answers didn't work out

a) [x^2-4)/(x^4-2x^2-8][(x^2+2)/x^2]

b) [x-1]+[1/(x+2)]+[1/(x-1)]

2. Find all rational zeros using the rational zero test: --Can't remember how to do the rational zero test...

F(x)=x^4-8x^3+17x^2-8^x+16

3. Write the equation of a line that is parallel to 2x+3y=6, that passes through the point (1,-1)

4. The vertices of a triangle are located at (1,-1), (1,3), and (4,2). Write the equation for the sides of the triiangle. --Do I use slope and distance or something else?