Simplify the questions that aren't crossed on the attachment, you

(3) (x - 2 +3(x +1))/3 = (4x+1)/3

(5) (3(x +1) +4x)/(x(x +1)) = (7x+3)/(x² +x)

(7) same as (5)

(8) (a(a +4))/((a -1)(a +4)) = a/(a -1) . . . . . a ≠ -4

(11) (2a -3b)/(4a(2a -3b)) = 1/(4a)

All except for b, because polynomial functions can be quadratic, cubic, witticisms and etc only non negative exponents of negative it is not a polynomial function