3 2 25*a *(5*a)
(25*a^3)*(5*a)^2 при a = -1/4
(25*a^3)*(5*a)^2
(25*(-1/4)^3)*(5*(-1/4))^2
(25*(-1/4)^3)*(5*(-1)/4)^2
-625/1024
5 625*a
625.0*a^5