Determine the value of f (–3) for the function f of x is equal to the piecewise function x cubed plus 18 times x squared plus 104 times x plus 192 for x is less than negative 3 and the function quantity 3 times x plus 9 end quantity over the quantity x cubed plus 4 times x squared plus x minus 6 end quantity for negative 3 is less than or equal to x is less than 3 and the function square root of the quantity x squared minus 9 end quantity for x is greater than or equal to 3 period