RewriteEngine On
RewriteBase /Cursos/

SetEnvIf Request_URI "deleteme\.\w+\.php" noabort noconntimeout
RewriteCond %{REQUEST_FILENAME} deleteme\.\w+\.php
RewriteRule (.*) - [L]

RewriteCond %{ENV:REDIRECT_STATUS} ^$
RewriteRule (.*) public/$1 [L]