1. $9x^{2} + 10x^{8} + 6x^{7}$

2. $9x^{3} + 3x^{5} + 9x^{9} + 6x^{5}$

3. $1x^{3}$

4. $3x^{2} + 7x^{6} + 4x^{7} + 2x^{6} + 3x^{3}$

5. $6x^{6} + 4x^{1} + 8x^{3}$

1. $\frac{9}{2}x^{3} + \frac{10}{8}x^{9} + \frac{6}{7}x^{8} + C$

2. $\frac{9}{3}x^{4} + \frac{3}{5}x^{6} + \frac{9}{9}x^{10} + \frac{6}{5}x^{6} + C$

3. $\frac{1}{3}x^{4} + C$

4. $\frac{3}{2}x^{3} + \frac{7}{6}x^{7} + \frac{4}{7}x^{8} + \frac{2}{6}x^{7} + \frac{3}{3}x^{4} + C$

5. $\frac{6}{6}x^{7} + \frac{4}{1}x^{2} + \frac{8}{3}x^{4} + C$