Выполните деление уголком x^4-7x^3+6x^2-5x-19 на x-1

X^4-7x^3+6x^2-5x-19 | _x-1
x^4-x^3                            x^3+6x^2+12x+7
      6x^3+6x^2
      6x^3-6x^2
              12x^2-5x
              12x^2-12x
                       7x-19
                        7x-7
                             +26