41. x2-7x-30 -60x+25 2
1.m(p-q)-p+q; -50x+8
2.a(ab+bc+ac)-abc;
3.x4-2y4-2x3y+xy3;
4.abc(a2+b2+c2)-a3bc+2ab2c2;
5.a2(b-c)+b2(c-a)+c2(a-b);
6.(x2-2x)2+2x(x-2)+1;
7.(x-y)2+12(y-x)z+36z2;
8.x2-4ax+8ab-4b2;
9. a4-9a2b2
10. a2-a-b2-b
11.(x+1)2-9(x-1)2; 12.16x2-81;
13.ab2-ac2+4ac-4a; 14.9x2-30x+25; 15.xy+6-2x-3y ;
16.(x+y)(a-b-c)+(x-y)(b+c -a) ;
17.x2-20x+100; 18.4x2-12x+5 ;
19.2ax2-3x+2ax-3; 20.x2+4xy+3y2;
21.x2
+18x-144; 22.x4+2x2-8; 23.-m4+18m2-17; 24.x5-2x3-8x;
25.(x+6)(x-6)-(x-6); 26.(x2-7x)2+10(x2-7x)-24; 27.5+7(a+1)-6(a+1)2; 28.3(x+2)(x-5)-(x+2)(x-3);
29.x2+y2-x2y2-4xy-1; 30.x2-4x-ax+4a ; 31.x2-y2-x-y;
32.ax2-bx2-bx+ax-3a+3b; 33.m4+2m2+1;
34.a2-b2+2ac+c2; 35.x2(x-y)+y2(y-x); 36.25x2-49; 37.12x2-23x;
38.x2+4xy+4y2-2x-4y-35; 39.m2-a2+4ab-4b2; 40.5m-5n-m2+2mn-n2.
44. x2+4x-xy-2y+4 45. 9x5-35x3-4x 46.a4-9a2b2; 47. (3a-b)2-4(3a-b)(a+3b)+4(a +3b)2 48. 9x2-30x+25 49. x2-9x+18 50. x(y+2)-x-y-1