(fog)(3)=f(g(3))=f(3*3-2))=f(7)=[tex](7-1)^{2}[/tex]=[tex]6^{2}=36[/tex]
(gof)(3)=g(f(3))=g(4)=3*4-2=12-2=10
(fog)(3)-(gof)(3)=36-10=26
