The eternal rivalry between mathematicians and physicists in one perfect frame! Mathematicians, clutching their pearls over the sanctity of calculus: "No, you can't just cancel out derivatives!" Meanwhile, physicists are smugly deriving rocket equations while breaking every mathematical rule in the book.
This is basically the scientific equivalent of watching someone solve a Rubik's cube by peeling off the stickers. The mathematician is having a full-on crisis while the physicist is busy getting people to the moon with what mathematicians consider mathematical blasphemy. The Tsiolkovsky rocket equation doesn't care about your mathematical purity!
The best part? NASA engineers are nodding along with the physicist while mathematicians everywhere are screaming internally.