RewriteEngine on

RewriteRule ^Page\.html$ mainpage.php [L]
RewriteRule ^Page-([a-zA-Z]+)\.html$ mainpage.php?id=$1 [L]
RewriteRule ^Page-([a-zA-Z]+)-([a-zA-Z0-9]+)\.html$ mainpage.php?id=$1&ids=$2 [L]
RewriteRule ^resultat\.html$ resultat.php [L]

RewriteRule ^execution-([0-9]+)\.html$ traitement.php?id=$1 [L]