Номер 2
а)(а-b)(7+x)
б)x(x-a)-y(x-a)=(x-a)(x-y)
Номер 3
=(8a-8m)-(ay-my)=8(a-m)-y(a-m)=(a-m)(8-y)
3a-15+ax-5x= Незнаю
Номер 4:
5(b-4)-x(b-4)=5b-20-xb+4x
19a(c+y)+19(y+c)=19ac+19ay+19y+19c
8x(a+b)+a+b=8ax+8bx+a+b
x-p+(p-x)7=x-p+7p-7x=-6x+6p
5a-5y+pa-py=5a(1+p)-5y(p+1)=(p+1)(5a-5y)