Math Movie Quiz

Can you figure out what movie each of these mathematical equations represents? I couldn't. There are a lot of good guesses in the comments at Spiked Math Comics, but no definitive answer list. Link -via Geeks Are Sexy

10 Confessions of Car Salemen
Why Men Give Women Diamond Rings
Obscure Beatles Stories
What's Up with Eyebrows
How Does Your Garden Grow?
Caviar (and Roe)
A Hard Day's Night
Sweat, Body Odor, and Onion-Odor
Amazing Geek Tattoos at SDCC
9 Weird Facts About Babies
1b Signs
3b The Social Network
4a Sin City
5b Beauty and the Beast
2A is 'Great Balls of Fire'
2B is 'Duck Soup'
3A is 'Iron Cross'
get it? SIN city?