Mathematicians spend centuries writing 5! to represent 5×4×3×2×1=120, but put the question mark on the wrong side of the equation and suddenly you've invented factorial-inverse. The notation 120? = 5 is so elegant it hurts. Could've saved generations of students from writing those exclamation points that look suspiciously like they're just really excited about numbers.
My Proposal For Factorial-Inverse Notation

math-memes, factorial-memes, notation-memes, mathematics-memes, algebra-memes | ScienceHumor.io
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