Click an item in the list or group of pictures at the bottom of the problem and holding the button down, drag it into the
correct position in the answer box release your mouse button when the item is place if you change your mind, drag
the item to the trashcan click the trashcan to clear all your answers
order the polynomial in descending powers of do not spear terms (using -4r^s, +2rs, -5, and-3r^2)