$$ \beta+\gamma $$ --- $\alpha\$ --- \$\alpha\$ --- \\$\alpha$ --- `$`\alpha$ --- $\alpha`$` foo --- $`\alpha`$ --- $\alpha\$$ --- $$ \alpha\$ $$ --- tango $$ \alpha $$ --- $$\\alpha$$ --- $$\alpha$$ $$ \alpha\beta $$ --- > $$ > \alpha\beta > $$ --- $$$ \alpha $$$ --- $$ must \alpha $$ be ignored --- $$ \alpha $$ ``` code fence ```