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1.
The feeling of sadness-tinged regret you feel when you recall that you used to be able to do math.
A: I can't believe I don't remember how to differentiate this equation. I used to be good at math.

B: Ah, the rose-colored glasses of nostalgebra
by wotevs May 22, 2009

Words related to nostalgebra

algebra math mathematics nostalgia regret