(a+b)+3a(a+b) = (a+b)(3a+1)
2x(a-b)-(b-a) = (a-b)(2х+1)
3+a+a(3+a) = (3+а)(a+1)
(m-2n)-x(2n-m) = (m-2n)(x+1)
a-b-x(b-a) = (a-b)(x+1)
(x-1)²+x(x-1) = (x-1)(2x-1)
(x-2)²-(x+2)(x-1) = х²-4х+4-х²+х-2х+2 = 6-5х
(2x-1)²-x(2x-1) = (2x-1)(x-1)
(3x-1)²+(x+2)(3x-1) = (3x-1)(4x+1)