What is (f+g)(x)(f + g)(x)(f+g)(x) if f(x)=x2f(x) = x^2f(x)=x2, g(x)=2xg(x) = 2xg(x)=2x?
x2+2xx^2 + 2xx2+2x
x2−2xx^2 - 2xx2−2x
2x32x^32x3
x2⋅2xx^2 \cdot 2xx2⋅2x