If f(x)=x+5f(x) = x + 5f(x)=x+5 and g(x)=2xg(x) = 2xg(x)=2x, what is (f+g)(x)(f+g)(x)(f+g)(x)?
3x+53x + 53x+5
2x2+102x^2 + 102x2+10
2x+52x + 52x+5
x+7x + 7x+7