Exercise for the reader Memes

The universal panic that strikes when a textbook casually drops "the proof is trivial" and suddenly YOU'RE responsible for filling in 17 logical steps! Nothing makes a math student question their life choices faster than those four little words. The character's bewildered expression perfectly captures that moment of mathematical betrayal when authors decide their 8-page derivation is somehow "obvious" and "left to the reader." Pro tip: if your professor ever says "clearly" or "it can be easily shown," brace yourself—nothing easy follows those phrases!