12a3-9a+4a-3
(3a2+1)(4a-3)
5n3-10n2+3n-6
(5n2+3)(n-2)
35xy-5x-56y+8
(5x-8)(7y-1)
224az+56ac-84yz-21yc
7(8a-3y)(4z+c)
112xy-16x+128x2-14y
2(8x-1)(7y+8x)