If f(x) = -3x4 - 2x3 + 3x2, and g(x) = 3x4 - 4x3 + x2 then f(x) + g(x) =

a. 2x3 - 2x2

b. -6x3 + 4x2

c. -3x4 - 6x3 + 4x2

d. 3x4 + 2x3 - 2x2

I'm assuming the the numbers coming after the variables are meant to be exponents, and if I'm wrong just let me know

-3x^4 - 2x^3 + 3x^2 + 3x^4 - 4x^3 + x^2, rearrange to have like terms in order
-3x^4 +3x^4 - 2x^3 - 4x^3 +3x^2 + x^2, now simplify
                0    -6x^3 + 4x^2

(1/x + 1)^2 + 6 (1/x + 1) +5