The total imports of petroleum (in millions of barrels per day) in a given year is approximated by the polynomial 33x3-526x2+2087+6051.Where x represents the number of years 1975. The corresponding total of exports of petroleum is -x3+20x2+29x+181. Write the polynomial that represents how many more barrels per day were importes than exported in a given year. The polynomial is million barrels per day.