The annual profit of a company is equal to the difference between annual revenue and total annual expenses of the company. The annual revenue of the company is defined by the function R(x) = 6x4 − 4x2 + 11 and the annual total expenses of the company is defined by the function C(x) = 4x4 − 2x3 − 6x2 + x. What function defines the annual profit of the company