-6 x^5 y^6 z^3) / (-2 x^2 y^6 z^2) =
(21x) / (3xy) =
(3x^4) / (x^3) =
(-12 a^4 b^3 c^4) / (3 a^3 b^2 c^5) =
(–18 x^6 y^4 z^3) / (3 x^4 y^2 z) =
(-45 x^4 y^6) / (9 xy^6) =
(15 x^3 y^7) / (3 x^2 y^5) =
-4 ab/c
3 x^3 z
7/y
- 6 x^2 y^2 z^2
5 xy^2
-5 x^3
3x
