(-2a²b)²*(-3ab²)³=4a⁴b²*(-27)*a³b⁶= -108a⁴⁺³b²⁺⁶= -108a⁷b⁸

(-2m³np²)⁴:(10m¹⁰n⁴p⁸)=(16m¹²n⁴p⁸):(10m¹⁰n⁴p⁸)=1,6m¹²⁻¹⁰n⁴⁻⁴p⁸⁻⁸=1,6m²n⁰p⁰=
=1,6m²*1*1=1,6m²

7x²y³*(-0,4x³yz)=-2,8x²⁺³y³⁺¹z=-2,8x⁵y⁴z

(0,2a²bc³)³:(-0,01a⁶b³c⁹)=(0,2a⁶b³c⁹):(-0,01a⁶b³c⁹)=-20a⁶⁻⁶b³⁻³c⁹⁻⁹=
= -20a⁰b⁰c⁰=-20*1*1*1= -20

1/9x³y⁴z:(1/3xy)³=1/9x³y⁴z:(1/27x³y³)=3x³⁻³y⁴⁻³z=3x⁰yz=3yz