\[\boxed{\mathbf{828}.}\]
\[1)\log_{5}x > \log_{5}3\]
\[a = 5 > 1:\]
\[x > 3.\]
\[2)\log_{\frac{1}{5}}x \leq \log_{\frac{1}{5}}\frac{1}{8}\ \]
\[x \geq \frac{1}{8}.\]
\[a = \frac{1}{5} < 1:\]
\[3)\lg x < \lg 4\]
\[a = 10 > 1:\]
\[0 < x < 4.\]
\[4)\ln x > \ln{0,5}\]
\[a = 2,72 > 1:\]
\[x > 0,5.\]