\[9^4 = (9^2)^2 = 81^2 = 6561\]
\[7^4 = (7^2)^2 = 49^2 = 2401\]
\[8^6 = (8^2)^3 = 64^3 = 262144\]
\[3^8 = (3^4)^2 = 81^2 = 6561\]
\[6^4 + 5^4 = 1296 + 625 = 1921\]
\[8^4 - 3^4 = 4096 - 81 = 4015\]
\[6 \cdot 7 = 6^7 = 279936\]
\[-9 \cdot 4^6 = -9 \cdot 4096 = -36864\]
Ответ: a) 6561; б) 2401; в) 262144; г) 6561; д) 1921; e) 4015; ж) 279936; з) -36864