1. x3+y3+z3-3xyz 2. (x2+xy+y2)2-4xy(x2+y2) 3. 4(x2+3x+1)-(x2+x-4)2-(x2+5x+6)2 4. 6x4+7x3-36x2-7x+6 5. (1+x+x2+x3)2-x3 6. x4-2002x2+2003x-2002 7. (a-b)4+(a+b)4+(a2-b2)2 8. m4+m2-2mn-n2+1 9. p4-4p3-8p+4 10. a2+(a+1)2+(a2+a)2 11. x3y-xy3+x2+y2+1 12. (x2+1)2-x2+x(x-2)(x2+x+1) 13. (6x+7)2(3x+4)(x+1)-6 14. (x2-15x+54)(x2+11x+28)+350 15. x12+x9+x6+x3+1 16. 7(x-1)+4(x-1)(y+2)-20(y+2) 17. b-10ab+25 18. 9a-5 19. 5x-8x-13 20. 6x-11xy+3y 21. 10x-21xy+2y 22. 2(a+b) +(a+b)(a-b)-6(a-b)
求采纳