[tex]2*8:9+5-3: \frac{1}{2}*823+543: \frac{5}{7}= 2*8 *\frac{1}{9}+5-3*2*823+543* \frac{7}{5}=\\\\=\frac{16}{9}+5-4938+\frac{3801}{5}=1\frac{7}{9} -4933+760\frac{ 1}{5}= 1\frac{35}{45} -4933+760\frac{9}{45}=\\\\=-4931\frac{10}{45}+760\frac{9}{45}=-4171\frac{1}{45}[/tex]
