Разложите на множители:
1. (2m+n)(6m+2n)-(m-3n)(8m+16n);
2. m^2 -mn+am-an;
3. a^3 +5a^2 +5a +25;
4. b^3 +b^2*c-b^2*d-bcd;
5. x^2 +x-y^2 -y;
6. a^3 +a+b^3 +b;
7. x^16 -y^16 ;
8. x^2 -5x-14;
9. y^2 -4y-12;
10. a^4 +a^2 -2;
11. b^4 +b^2 +1;
12. x^4 -8x^2 +4;
13. x^8 +3x^4 +4;
14. x3 -3x2 +3x +7.