Без комментариев :с
 9х - 9у =
 5а + 5в =
 3ху - 3хс =
 12а - 3в =
 3а - 6в =
 15х + х =
 5х + х3 =
 x4 + х3 =
 6m2 - 12my =
 4a + 10b – 2 =
 2x + 4x2 + 6x3 =
 5x - 10x2 + 25x3 =
 8y2 + 3y3 + y4 =
 5c3 - 15c2 - 10c =
 9y5 - 12y3 + 3y2 =
 x(a + 3) - 4(a + 3) =
 6(x - 3) + y(x - 3) =
 7(y – 2) –x(y – 2) =
 5a(a + c) – (a + c) =
 6(a – c) + x(a – c) =
                                                            
                             
                         
                    
5•(а+в)
3х•(у-с)
3•(4а-в)
16х
х•(15+х^2) если х3 означает в кубе*
х^7
6х•(х-2у)
2•(2а+5b-1)
2x•(1+2x+3x^2)
5x•(1-2x+5x^2)
y^2•(8+3y+y^2)
5c•(c^2-3c-2)
3y^2•(3y^3-4y+1)
(x-4)•(a+3)
(6+y)•(x-3)
(7-x)•(y-2)
(5x-1)•(a+c)
(6+x)•(a-c)