$\begin{array}{l}\phantom{\phantom{;}x\phantom{;}+3;}{\phantom{;}3x\phantom{;}-9\phantom{;}\phantom{;}}\\\phantom{;}x\phantom{;}+3\overline{\smash{)}\phantom{;}3x^{2}\phantom{-;x^n}+2\phantom{;}\phantom{;}}\\\phantom{\phantom{;}x\phantom{;}+3;}\underline{-3x^{2}-9x\phantom{;}\phantom{-;x^n}}\\\phantom{-3x^{2}-9x\phantom{;};}-9x\phantom{;}+2\phantom{;}\phantom{;}\\\phantom{\phantom{;}x\phantom{;}+3-;x^n;}\underline{\phantom{;}9x\phantom{;}+27\phantom{;}\phantom{;}}\\\phantom{;\phantom{;}9x\phantom{;}+27\phantom{;}\phantom{;}-;x^n;}\phantom{;}29\phantom{;}\phantom{;}\\\end{array}$

$3x-9+\frac{29}{x+3}$