Having some difficult with a few problems

if you could explain how to do the equation that would be great!

1)https://webwork2.uncc.edu/webwork2_f...1ef6263fc1.png

the answer has to be in the form of f(x)/g(x)

2) After fully simplifying the expressionhttps://webwork2.uncc.edu/webwork2_f...33d88a6e41.png

3)Simplify the complex rational expression

into a standard rational expression.

4)

https://webwork2.uncc.edu/webwork2_f...1028765b81.png

solve for a and b

5)

https://webwork2.uncc.edu/webwork2_f...a919e89ab1.png

use the rules https://webwork2.uncc.edu/webwork2_f...b8ab3e4f21.png and https://webwork2.uncc.edu/webwork2_f...3237655491.png.

6)Evaluate the expression https://webwork2.uncc.edu/webwork2_f...f9a94cc931.png using https://webwork2.uncc.edu/webwork2_f...21a1137b71.png.

I got 264 for this one...but we are allowed to check out work..and it says im wrong?

7)

If you rationalize the denominator of then you will get