Merge regex

hi , I would like to merge those 3 regex in one ,so i can use it in L7, I want all of them in the download expression:
/ip firewall layer7-protocol
add comment=“” name=download regexp=“^.get.+\.(exe|pdf|dat|doc|docs|nrg|vcd|rar|iso|zip|7zip|flv|mkv|avi|mp4|3gp|rmvb|mp3|img|dat|mov).$”
add comment=“BIT TORENT” name=bittorrent regexp=“^(\13bittorrent protocol|azver1$|get /scrape\\?info_hash=)|d1:ad2:id20:|8’7P\)[RP]”
add comment=“TORRENT WEBSITES” name=torrentsites regexp=“^.(get|GET).+(torrent|thepiratebay|isohunt|entertane|demonoid|btjunkie|mininova|flixflux|torrentz|vertor|h33t|btscene|bitunity|bittoxic|thunderbytes|entertane|zoozle|vcdq|bitnova|bitsoup|meganova|fulldls|btbot|flixflux|seedpeer|fenopy|gpirate|commonbits).$”