f:x→x2;g:x→x+3f : x \to x^{2} ; g : x \to x + 3f:x→x2;g:x→x+3
g(2)=2+3=5g(2) = 2 + 3 = 5g(2)=2+3=5
fog(2)=f(5)=52=25f o g(2) = f(5) = 5^{2} = 25fog(2)=f(5)=52=25
