4. If the length of a rectangle in terms of x centimeters is 5x2 + 4x - 4 centimeters and its width is 3x2 + 2x + 6 centimeters, what is the perimeter of the rectangle? Put your answer in simplified form.
(6 pts- 1 pt for correct process, 1 gt for correctly multiplying, 1 pt for correctly combining like terms)