s/\\textbackslash{}/\\/g ;
s/\\%/%/g;
s/\\bog{}/"/g;
s/\\cog{}/"/g;
s/__blongrightarrow__/<i class="fa fa-long-arrow-right" aria-hidden="true"><\/i>/g ;
s/__bbmathequation__/<math>/g ;
s/__bemathequation__/<\/math>/g ;
