“Old math teachers never die—they just reduce to lowest terms”

“Old soldiers never die—they just fade away” is an old saying that was popularized by General Douglas MacArthur (1880-1964) in his farewell address to Congress on April 19, 1951. Many parodies of the saying have been made.
     
There have been many math versions. “old mathematicians never die, they just reduce to lowest terms” was posted on the newsgroup rec.humor on May 17, 1995. “OLD MATH TEACHERS never die, they just reduce to lowest terms” was posted on the newsgroup rec.humor on June 2, 1995.
   
“Old math teachers never die—they just become irrational” and “Old mathematicians never die—they just lose some of their functions” are related sayings.
           
   
Google Groups: rec.humor 
old—- never die jokes
KRod
May 17, 1995, 3:00:00 AM
(...)
old mathematicians never die, they just reduce to lowest terms
 
Google Groups: rec.humor
Canonical List of Old * Never Die, they just ...
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Jun 2, 1995, 3:00:00 AM
(...)
OLD MATH TEACHERS never die, they just reduce to lowest terms
 
Twitter
Murray Bourne
@bourne_2_learn
Daily Math Tweet: Old math teachers never die, they just get reduced to lowest terms. #math
9:00 AM · Jun 18, 2009·Twitter Web Client
   
Twitter
Leena
@lekahe
disagree- @intmath Daily Math Tweet: Old math teachers never die, they just get reduced to lowest terms. #math
9:01 AM · Jun 18, 2009·Twitter Web Client
   
Twitter
Ahh! Photography
@AhhPhotography
Old math teachers never die, they just reduce to lowest terms
5:00 PM · Jan 26, 2010·Twitter Web Client
   
Twitter
David Ferrell
@ferrellllc
“Old math teachers never die, they lose some functions, are reduced to their lowest terms, go off on a tangent and disintegrate.”
7:55 PM · May 31, 2014·Facebook
   
Twitter
Murray Bourne
@bourne_2_learn
Old math teachers never die, they just get reduced to lowest terms.
4:15 AM · Jun 10, 2020·bourne_2_learn
 
Reddit—Jokes
Posted by u/Shade_Xaxis May 14, 2021
Math Teachers never die
They just reduce to lowest terms