Given f(x)=x2f(x) = x^2f(x)=x2 and g(x)=x+1g(x) = x + 1g(x)=x+1, what is the composite function (g∘f)(x)(g \circ f)(x)(g∘f)(x)?
x2+1x^2 + 1x2+1
(x+1)2(x+1)^2(x+1)2
x2+2x+1x^2 + 2x + 1x2+2x+1
x+1+x2x + 1 + x^2x+1+x2