Writing 41, via Dan

University of Arkansas.
Bell Engineering.
Fayetteville, Arkansas USA 72701.
Men's restroom, 2nd floor.

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Letters added, F marked out:

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Also, there's a diagram illustrating the fundamental theorem of calculus. A = integral with limits from x0 to x1 of f(x)dx, with drawing showing A, x0, x1, etc. Perfect for an engineering hall.