Y=f(x)=2^x find f(x) when x=1i have a bunch of these questions to do and i'm not sure how to do

Express in the simplest form: (x^2+9x+14/x^2-49) / (3x+6/x^2+x-56)

What can each term of the equation be multiplied by to eliminate the fractions before solving? x – + 2x = + x 2 6 10 12

If you could answer these your a life saver