$=\frac{x^{5}-x^{4}+x^{3}-x^{2}+7x-10}{x-1}$
Divide $ \frac{x^{5}-x^{4}+x^{3}-x^{2}+7x-10}{x-1}:{\quad}\frac{x^{5}-x^{4}+x^{3}-x^{2}+7x-10}{x-1}=x^{4}+\frac{x^{3}-x^{2}+7x-10}{x-1}$$=x^{4}+\frac{x^{3}-x^{2}+7x-10}{x-1}$
Divide $ \frac{x^{3}-x^{2}+7x-10}{x-1}:{\quad}\frac{x^{3}-x^{2}+7x-10}{x-1}=x^{2}+\frac{7x-10}{x-1}$$=x^{4}+x^{2}+\frac{7x-10}{x-1}$
Divide $ \frac{7x-10}{x-1}:{\quad}\frac{7x-10}{x-1}=7+\frac{-3}{x-1}$$=x^{4}+x^{2}+7+\frac{-3}{x-1}$
Simplify$=x^{4}+x^{2}+7-\frac{3}{x-1}$