f(x) = 1
f(x) = 2x
f(x) = 9x^{2}^{}
f(x) = 10x+2
f(x) = 16x^{3}–2
f(x) = –6x^{2}–12x
f(x) = 20x^{3}+3x^{2}
f(x) = 12x^{3}–6x
f(x) = 20x^{3}+18x^{2}–2
f(x) = –24x^{7}+49x^{6}+25x^{4}^{}
f(x) = –28x^{3}+6x^{2}–4
f(x) = 35x^{4}–30x^{2}–10x
f(x) = –50x^{4}–24x^{3}+1
