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Answer:

[tex]10. \\ 2u ^ { 3 } -u ^ { 2 } +2u+5 \div u-3 \\ \\ \frac{\left(2u^{3}-u^{2}+2u-3\right)u}{u}+\frac{5}{u} \\ \\ \frac{\left(2u^{3}-u^{2}+2u-3\right)u+5}{u} \\ \\ \frac{2u^{4}-u^{3}+2u^{2}-3u+5}{u} \\ \\ \frac{2u^{4}-u^{3}+2u^{2}-3u+5}{u}[/tex]

9.

t ^ { 4 } +t ^ { 3 } +4t ^ { 2 } +6t+2 \div t+3

\frac{\left(t^{4}+t^{3}+4t^{2}+6t+3\right)t}{t}+\frac{2}{t}

\frac{\left(t^{4}+t^{3}+4t^{2}+6t+3\right)t+2}{t}

\frac{t^{5}+t^{4}+4t^{3}+6t^{2}+3t+2}{t}