$\left(7\frac{4}{5}-3,5\cdot 1\frac{1}{5}\right):\left(5\frac{4}{5}-2,2\right)-\frac{1}{4}=\left(7\frac{4}{5}-{\sout{3,5}}^{0,7}\cdot \frac{6}{{\sout{5}}^1}\right):\left(5,8-2,2\right)-\frac{1}{4}=$