A function that begins for small (large negative) x with large positive y-values, which touches the x-axis and turns around at -3, crosses the x-axis at 1, and crosses the x-axis at 3.
(Note that the vertical and horizontal scales are not the same.)

Find the formula for the graph above, given that it is a polynomial, that all zeros of the polynomial are shown, that the exponents of each of the zeros are the least possible, and that it passes through the point .