I much admire the work of Nikki Giovanni -- a poet who spoke both fearlessly and eloquently. As she deserved, her life was big news in the Washington Post -- I learned of her passing (on December 9) in a front-page article that celebrated her work and her person. Another informative Post tribute to Giovanni is available here -- and a rich sampling of her poetry is available here at PoetryFoundation.org.
Giovanni has not included math ideas in many of her poems but I did find some counting in "The Way I Feel" -- sampled in this blog at this link -- and I offer below a few lines from "Balances"; Giovaanni's complete poem is available here.