Search engines are very useful in my search for mathy poets and poems. Recently I have noticed that a link to images has been offered prior to the verbal links when I have queried Google using "mathematics poetry." Some of the visuals are quotations, some are book-covers, some are poems. When you have time, explore and enjoy!
Finding more via Google that I expected connected me with an old poem. Here, unearthed recently, is "Expectation" -- some lines from the 1980s, when I was beginning to write poems.
Expectation
teach you to expect two teach you to expect one
to be more than one. to be the sum of its parts.