Упростите:
1)(8xy)^2/16xy^3;
2) 48a^4m^3/(4am)^3;
3)-27a^6b^3/(9a^2b)^4;
4)(4x^2y^5)^2/-(3x^2y^2)^3;

1) 64х²у²/16ху³ = 4х/у2) 48а^4 m³/64a³m³ = 3a/43) -27a^6b³/6561a^8b^4 = -1/243a²b4)16x^4y^10/-27x^6y^6= - 16y^4/27x²