Which of the following is the notation for adding two functions, f(x) and g(x) together?

What is (f+g)(x) if f(x)=7x-3 and g(x)=2x+5?

Find $$\left(f+g\right)\left(x\right)$$ if $$f\left(x\right)=3x^2-2x+5$$ and $$g\left(x\right)=x^2+6x-7$$

If f(x)=5x+7 and g(x)=-2x-4, find (f+g)(2)

If $$f\left(x\right)=6x^2+3x-2$$ and $$g\left(x\right)=-2x^2-5x+9$$ then find (f+g)(1).

NOT TWO THIS TIME, PLUG IN ONE.