1 - I heard this as the fist track on MURK: Made In Miami (Sirius Area 33) - 10-12-2007 set, you can find that set on Tribal Mixes, and its INSANE!!!!!
2 - deadmau5_&_glenn_morrison_-_contact / Could be finished symphony, they both almost sound the same "Deadmau5"
4 - juice string - sex weed (laidback luke remix)

thank you for helping, yes maybe the #2 is Hybrid - finished symphony (deadmau5 rmx)
"contact" sound similar and I was searching it too, thank you.

Now I hope help for the #3 and #5

#2 is Deadmau5 - not exactly

beeautifuuuul