so exg if f(x)=2x g(x)=3x then (f o g)(x)=f(g(x))=f(x)=2(3x) so f o g(2) means in this equation subsitute 2 for x (f o g)(2)=f(g(2))=(|1-2|)^2+4(|1-2|)
the x in the f(x) is g(x)so first evaluate g(2) so g(2)=|1-2|=|-1|=1 g(2)=1 then f(1)=1^2+4(1)=1+4=5
