The expression is
- 2a^6 * b^-5 -2a^(6-2) * c^3 - a^4 * c^3
------ = ------ = ------
6c^-3 *b^-4 * a^2 6 * b^(5-4) 3 * b
- 2a^6 * b^-5 -2a^(6-2) * c^3 - a^4 * c^3
------ = ------ = ------
6c^-3 *b^-4 * a^2 6 * b^(5-4) 3 * b