The term "Equation Poetry" is the title of an article by Radoslav Rochallyi -- and posted on 11/9/ 2021 here in the MATH VALUES blog. Rochallyi is a poet, essayist, and interdisciplinary artist living in Prague, Czech Republic and author of eight books of poetry. For Rochallyi, "mathematical" poetry is not poetry about mathematics but poetry whose form is determined by a mathematical rule.
For example, he uses the formula for the area of a circle -- a = π r² -- to form this example of Equation poetry:
And, from the binomial formula,