Suppose f(x)=54x+18\displaystyle {f}{''}{\left({x}\right)}={54}{x}+{18}, f(1)=35\displaystyle {f}'{\left({1}\right)}={35}, and f(1)=4\displaystyle {f{{\left({1}\right)}}}={4}.

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