484. Выполнить действия: 1) (5a/(7b))²·25a³; 2) (3a²/(2b))³·16b³/(21a⁴); 3) (ab/(cd))²·acd; 4) abc²·(ab/(cd))².

1) 25a²/(49b²)·25a³ = 625a⁵/(49b²).

2) 27a⁶/(8b³)·16b³/(21a⁴) = 54a²/7.

3) a²b²/(c²d²)·acd = a³b²/(cd).

4) abc²·a²b²/(c²d²) = a³b³/d².