Oxygen and helium are hanging out at their bar, having a few drinks. Gold walks in the door. Hydrogen is not a huge fan of gold, and he's a bit drunk, so from across the room he yells "AU! GET OUT OF MY BAR!"
Sin(x), Cos(x), and e^(x) are having a party. Sin(x) and cos(x) are having a great time, mingling and chatting with all their guests, but they notice e^(x) sulking in a corner. They go over to him and try to make him feel better. "Maybe you'll have more fun with people if you try to integrate yourself!" But e^(x) just shakes his head and sighs. "No, what would be the point? I'll still be the same."
nerdy math/science jokes. I'm so sorry.