а) 16ab^2+5b^2c+10c^3+32ac^2= 16ab^2+32ac^2+5b^2c+10c^3 = 16a(b^2+2c^2) + 5c(b^2+2c^2) = (b^2+2c^2)(16a+5c)
б)20n^2-35a-14an+50n=-35a-14an+50n+20n^2 = -7a(5+2n)+10n(5+2n) = (5+2n)(10n-7a)
в)18a^2+27ab+14ac+21bc=9a(2a+3b)+7c(2a+3b) = (2a+3b)(9a+7c)
г)2x^2yz-15yz-3xz^2+10xy^2 = -15yz-3xz^2+2x^2yz+10xy^2 = -3z(5y+xz)+2xy(xz+5y) = (5y+xz)(2xy-3z)