Разложите на множители: 1) 35a^2-42ab+10a^2b-12ab^2 2) x^3+x^2y+x^2+xy 3) mn^4-n^4+mn^3-n^3

1)=a*(35a-42b+10ab-12b^2)

a*(7(5a-6b)+2b*(5a-6b))

a*(7+2b)*(5a-6b)

2)=x*(x^2+xy+x+y)

x*((x*(x+y)+x+y)

x*(x+1)*(x+y)

3)=n^3*(mn-n+m-1)

n^3*(m*(n+1)-(n+1))

n^3*(m-1)*(n+1)