д) (m + 2n + 5k + p)^2

(m + 2n + 5k + p)^2 = (m + 2n)^2 + 2 * (m + 2n)(5k + p) + (5k + p)^2 = m^2 + 4mn + 4n^2 + 2(5km + mp + 10nk + 2np) + 25k^2 + 10kp + p^2 = m^2 + 4n^2 + 25k^2 + p^2 + 4mn + 10km + 2mp + 20nk + 4np + 10kp.