Помогите ,пожалуйста .Номер 5.13.УМОЛЯЮ

1) ..=4n^2(m+3n)+m+3n=(4n^3+1)(m+3n) 2) ..=y^2(5n-m)-2y(5n-m)=(y^2-2y)(5n-m) 3) ..=km(m+1)+lm(m+1)-pm(m+1)=(km+lm+pm)(m+1) 4) ..=3a(7y^2-2y+1)-x(7y^2-2y+1)=(3a-x)(7y^2-2y+1) 5) ..=l^2(8xy-7m)-p^2(8xy-7m)=(l^2-p^2)(8xy-7m) 6) ..=4ab^2(ab+m)-9bm^2(ab+m)=(4ab^2-9bm^2)(ab+m) 7) 8ab(3m-2n^2)+14cd(3m-2n^2)=(8ab+14cd)(3m-2n^2) 8) ..=3b^2(a-b)-c(a-b)+d(a-b)=(3b^2-c+d)(a-b)