"The author portrays the character with a few simple traits" would describe a flat character, since "flat" is the opposite of "deep" when it comes to showing different character trains, personality flaws, etc.
Answer: f(x) = 3x^2 + 1
g(x) = 1 - x
(f - g)(x) = 3x^2 + 1 - (1 - x) = 3x^2 + 1 - 1 + x = 3x^2 + x
(f - g)(2) = 3(2)^2 + 2 = 3(4) + 2 = 12 + 2 = 14.
