Упростите выражения (2p-q)^2-(q+2p)^2

(2p-q)^2-(q+2p)^2 == ((2p)^2 - 2*2p*q + q^2 ) - (q^2 + 2*q*2p + (2p)^2) = = 4p^2 - 4pq + q^2 - q^2 - 4pq - 4p^2 = = -8pq--------------------------------------------