f(x) = 4
g(x) = (4 * x^(5)) - (2 / 3 * x^(3)) + (2 * x) - 5
h(x) = (12 * x^(3)) - x^(2) - (6 * x)
i(x) = x^((-6))
j(x) = ((4 * x^(2)) - 3) / ((2 * x))
k(x) = ((4 * x^(2)) - 3)^(3)