{\frac{3:\frac{1}{3}\cdot 9-(20-1\frac{1}{4})\cdot (-2^2)}{[3\frac{1}{6}-(-1,25)]\cdot 2,4-5,8}=\frac{3\cdot \frac{3}{1}\cdot 9-\frac{80-5}{4}\cdot (-4)}{(\frac{19}{6}+\frac{125}{100})\cdot 2,4-5,8}=\frac{81+75}{\frac{19}{6}+\frac{5}{4})\cdot 2,4-5,8}=}
\frac{156}{\frac{76+30}{\not24^1}\cdot \frac{\not24^1}{10}-5,8}=\frac{156}{\frac{106}{10}-5,8}=\frac{156}{10,6-5,8}=\frac{156}{4,8}=\frac{1560}{48}=\frac{65}{2}=32,5