$a)\frac{2^4\cdot {\left(\frac{1}{2}\right)}^4+{\left(2^8:2^6\right)}^2-{\left(5^{17}\right)}^0}{6^7\cdot {\left(\frac{2}{3}\right)}^7\cdot {\left(\frac{1}{4}\right)}^7+3^5:9^2}=$   $\frac{{\left({\sout{2}}^1\cdot \frac{1}{{\sout{2}}^1}\right)}^4+{\left(2^2\right)}^2-1}{{\left({\sout{6}}^2\cdot \frac{{\sout{2}}^1}{{\sout{3}}^1}\cdot \frac{1}{{\sout{4}}^2}\right)}^7+3^5:{\left(3^2\right)}^2}=$