哪有分解质因数的题

提取公因式法分解因式
(1)-15ax-20a;

(2)-25x8+125x16;

(3)-a3b2+a2b3;

(4)6a3-8a2-4a;

(5)-x3y3-x2y2-xy;

(6)a8+a7-2a6-3a5;

(7)6a3x4-8a2x5+16ax6;

(8)9a3x2-18a5x2-36a4x4;

(9)

(10)am-am+1;

(11)-12a2n+1bm+2+20am+1b2n+4;

(12)x(a+b)+y(a+b);

(13)(a+b)2+(a+b);

(14)a2b(a-b)+3ab(a-b);

(15)x(a+b-3c)-(a+b-3c)

(16)a(a-b)+b(b-a);

(17)(x-3)3-(x-3)2;

(18)a2b(x-y)-ab(y-x);

(19)a2(x-2a)2-a(2a-x)2;

(20)(x-a)3+a(a-x);

(21)(x-2y)(2x+3y)-2(2y-x)(5x-y);

(22)3m(x-5)-5n(5-x);

(23)y(x-y)2-(y-x)3;

(24)a(x-y)-b(y-x)-c(x-y);

(25)(x-2)2-(2-x)3;

(26)m(n-2)-p(2-n)+(n-2);

(27)a3-b3-a2+b2;

(28)(m-a)2+3x(m-a)-(x+y)(a-m);

(29)a2(x-2a)3-a(2a-x)2;

(30)(a-3)(