Sup, I don't know how to do this. I must operate and then

>>26560
some of them are very easy e.g. 17:
eliminate 4 and x^2 and you obtain
3x/(x-1)

I'll do another one:
15) Write the factor on the left as a fraction by determining a common denominator:

(x+1)(x-1) = x^2 - 1
so the term on the left is
(x-1)/(x^2 - 1) + 2(x+1)/(x^2-1) = (3x+1)/(x^2-1)

You can now eliminate x^2-1 (for x different than +/-1) and obtain for the whole term

(3x+1)/(x^2+2x+1) = (3x+1)/(x+1)^2

>>26588
Well, it's easier than I thought.
I was basically trying Ruffini on everything haha.
Thanks m8.

>>26560
What the fuck? These are like less than high school level. Are you sure you're 18 y/o?

>>26592
19. I repeated two years, I'm in Spain and these are the easy maths, because I am studying history, not science.