Word problem really need with this, and by end of day today would be best the total imports of petroleum ( in millions of barrels per day) in a given year is approximated by the polynomial 40x^3 -526x^2+2089x+6056, where x represents the number of years since 1975. the corresponding total of exports of petroleum is -x^3 +13x^2 +29x+189. write a polynomial that represents how many more barrels per day were imported than exported in a given year.