Divide. If there is a remainder, express it in the form rx4\displaystyle \frac{{r}}{{{x}-{4}}}.

(x311x2+20x+49)÷(x4)\displaystyle {\left({x}^{{3}}-{11}{x}^{{2}}+{20}{x}+{49}\right)}\div{\left({x}-{4}\right)} =