The Florida Department of Education revealed instances of questionable material that forced the state to ban hundreds of math textbooks—including one that had an algebra graph measuring racial prejudice.

The DOE rejected 54 math textbooks—roughly 41% of publisher submissions—on the grounds that they allegedly attempted to indoctrinate students or expose them to “dangerous and contentious ideas.” In response to a deluge of requests for examples of the limits, the agency posted four photos of arithmetic problems on its website on Thursday. What? What about me? As stated in a lesson titled “Adding and Subtracting Polynomials,” add and subtract polynomials. Over 2 million people have completed an online version of the Implicit Association Test to determine their level of racial prejudice. While the majority of groups get average evaluations of “slight” to “moderate” discrimination, the issue observes that the disparities across groups by age and political affiliation are “intriguing.”