I dont understand this one

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

Question 3(multiple choice worth 1 points) use the arc length formula and the given information to find r. s = 16 cm, θ = 48°; r = ? sixty divided by pi cm thirty divided by pi cm one third cm one hundred twenty divided by pi cm

Rewrite the polynomial -9x5 + 36x4 + 189x3 in factored form.