1) 2а( c-d )^3+3d(c-d)^2 2)8a^3b^5+16a^4b^4-32a^5b^3
3) 25x^2-(x+y)^2
4)ax^2+bx^2-bx-ax+cx^2-cx 5)a^4+a^3+a+1

1-(c-d)^2x(2ac-2ad+3d)

2-

3-(4x-y)x(6x+y)

4-

5-(a+1)^2x(a^2-a+1)