ax - bx + ay - by + az - bz
(ax + ay + az) -(bx + by + bz)
a(x + y + z) - b(x + y + z)
(x + y + z)(a - b)
6ax-4bx-8cx-3a+2b+4c
(6ax-4bx-8cx) -( 3a -2b - 4c)2x(3a - 2b - 4c) - ( 3a -2b - 4c)( 3a -2b - 4c)(2x - 1) 3x^3-mx^2+12xy^2+3xz-mz-4my^2
(3x^3 + 12xy^2 + 3xz) - (mx^2 + 4my^2 + mz )
3x( x2 + 4y2 + z ) - m(x2 + 4y2 + z)