$\begin{array}{l}\phantom{\phantom{;}x\phantom{;}-12;}{-2x^{3}-21x^{2}-253x\phantom{;}-3036\phantom{;}\phantom{;}}\\\phantom{;}x\phantom{;}-12\overline{\smash{)}-2x^{4}+3x^{3}-x^{2}\phantom{-;x^n}-1\phantom{;}\phantom{;}}\\\phantom{\phantom{;}x\phantom{;}-12;}\underline{\phantom{;}2x^{4}-24x^{3}\phantom{-;x^n}\phantom{-;x^n}\phantom{-;x^n}}\\\phantom{\phantom{;}2x^{4}-24x^{3};}-21x^{3}-x^{2}\phantom{-;x^n}-1\phantom{;}\phantom{;}\\\phantom{\phantom{;}x\phantom{;}-12-;x^n;}\underline{\phantom{;}21x^{3}-252x^{2}\phantom{-;x^n}\phantom{-;x^n}}\\\phantom{;\phantom{;}21x^{3}-252x^{2}-;x^n;}-253x^{2}\phantom{-;x^n}-1\phantom{;}\phantom{;}\\\phantom{\phantom{;}x\phantom{;}-12-;x^n-;x^n;}\underline{\phantom{;}253x^{2}-3036x\phantom{;}\phantom{-;x^n}}\\\phantom{;;\phantom{;}253x^{2}-3036x\phantom{;}-;x^n-;x^n;}-3036x\phantom{;}-1\phantom{;}\phantom{;}\\\phantom{\phantom{;}x\phantom{;}-12-;x^n-;x^n-;x^n;}\underline{\phantom{;}3036x\phantom{;}-36432\phantom{;}\phantom{;}}\\\phantom{;;;\phantom{;}3036x\phantom{;}-36432\phantom{;}\phantom{;}-;x^n-;x^n-;x^n;}-36433\phantom{;}\phantom{;}\\\end{array}$

$-2x^{3}-21x^{2}-253x-3036+\frac{-36433}{x-12}$