Suppose f(x)=4x+3\displaystyle {f{{\left({x}\right)}}}={4}{x}+{3} and g(x)=6x2x+5\displaystyle {g{{\left({x}\right)}}}={6}{x}^{{2}}-{x}+{5}.

Then (fg)(x)=\displaystyle {\left({f}{g}\right)}{\left({x}\right)}=