1) (1, 8a ^ 9 - 2, 4a ^ 8 + 3, 6a ^ 15) / 0 ,06a^ 5

2) (a ^ 3 * b ^ 4 * c ^ 5 + a ^ 5 * b ^ 4 * c ^ 3) :(a^ 3 b^ 3 c^ 3 4 )(a^ prime -a^ 8 ): a ^ 7 + (a ^ 6 + a ^ 5) / (a ^ 4)

3) (8b ^ 3 - 9b ^ 2) / (- 2b ^ 2) -(10b^ 3 -20b^ 2 ): (-5b²)

6) ( angle a^ prime prime -a^ prime ): a ^ 7 - (8a ^ 6 + 5a ^ 4) * a ^ 2

5) (a³ b+6ab²): (-ab) + (8a3b-8ab2): (-2ab)

7 (5 2/3 * a + 4 1/4 * b + 2 1/8 * c) / (1 10/11)