Let's make this birthday one to remember.

39 years old (Born on February 26, 1986)

Happy Birthday, Marcos Castro! You're the only mathematician-comedian-musician-gamer hybrid we know who can seamlessly blend calculus jokes with catchy tunes and epic gaming fails. Your YouTube channel continues to be a treasure trove of laughter—proving once again that math plus comedy equals infinite fun.

From your hilarious stand-up routines to those unforgettable musical parodies, you've kept us entertained through every viral hit and clever punchline. May this year bring you even more success (and fewer rage quits), because let's face it: leveling up in life is way easier than beating Dark Souls blindfolded!

Keep rocking—and calculating—the laughs!