Question

Can someone make sure I did this right?
Suppose that the functions r and s are defined for all real numbers x as follows.

r(x)=x+6
s(x)=2x-4
Write the expressions for (s+r)(x) and (s-r)(x) and evaluate (s.r)(1)

(s+r)(x)=(2x-4)+(x+6)
s-r)(x)=(2x-4)-(x+6)
(s.r)(1)= 2(x-2) over x+6