| a^2+ab+ac+bc | (a+c)(a+b) |
| mx-my-nx+ny | (m-n)(x-y) |
| 5x-10y+2bx-4by | (5+2b)(x-2y) |
| 7bx-5b-7x+5 | (b-1)(7x-5) |
| x^3-x^2+x-1 | (x^2+1)(x-1) |
| a^4+a^3+3a+3 | (a^3+3)(a+1) |
| xy+x+y+1 | (x+1)(y+1) |
| 2a^3-2a^2+a-1 | (2a^2+1)(a-1) |
| 5ax-3x+5a-3 | (x+1)(5a-3) |
| 7a+7b+7c-xa-xb-xc | (7-x)(a+b+c) |
| 15uw-3vw-5u+v | (3w-1)(5u-v) |
| 10a+ab+10b+b^2 | (a+b)(10+b) |
| 3ab-3a+2b-2 | (3a+2)(b-1) |
| xy+5x-y-5 | (x-1)(y+5) |
| 5ce-15c+2e-6 | (5c+2)(e-3) |