Question 474597
{{{f(x)= x^2+5x+3 }}}
{{{g(x)=x+2}}}
(fog)(x)={{{f(g(x))=(g(x))^2+5g(x)+3=(x+2)^2+5(x+2)+3=x^2+4x+4+5x+10+3=x^2+9x+17}}}
 (gof)(x)={{{g(f(x))=f(x)+2=x^2+5x+3+2=x^2+5x+5}}}
(fog)(2)={{{2^2+9*2+17=39}}}
(gof)(-2)={{{(-2)^2+5*(-2)+5=-1}}}