A.2.
15uv - 5ut + 20ur - 45u
5u( 15uv/5) - 5ut/5 + 20ur/5 - 45u/5
5u(3v - t + 4r - 9)
----------------
27a^3bc^2 - 81a^2bc^2 + 729b^3
27 × a × a × a × b × b × c × c - 81 × a × a × b × b × c × c + 729 × b × b × b × 1
27b ( a^3c^2 - 3ac^2 + 27b^2)
-----------------
2/5ab + 3/5a^2b - 4/5abc + 1/5a
2 × 1/5 × a × b + 3 × 1/5 × a × a × b - 4 × 1/5 × a × b × c + 1/5 × a × 1
1/5 × a × ( 2b + 3ab - 4bc + 1 )
--------------------
A.3
9d - 27a^3d + 3d^2 ( - 3d )
( - 3d ) ( - 3 + 9a^3 - d )
--------------
12a^3d^3 + 28a^2d^2 + 48ad^3 ( - 4ad )
( - 4ad ) ( - 3a^2d^2 - 7ad - 12d^2 )
Stimmt das ?