a^12*(a^-4)^4=
при a=-1|2
A^(-4)^4 = A ^ ( - 16) A ^ 12 * A ^ ( - 16 ) = A ^ ( - 4 ) = 1 / A^4 ================================ A = ( - 1/2 ) ( - 1/2) ^4 = + 1/ 16 1 / 1/16 = 16 ========================== Ответ 16