Ƙirƙirar wani nau'i mai mahimmanci na wannan jumla Kalmar'' FOIL'' an tsara shi ne kawai a matsayin mnemonic ga daliban makarantar sakandare da ke koyon algebra.
Tabbas, wani nau'i mai rikitarwa na jumla shine "An fara amfani da kalmar '' FOIL '' ne kawai a matsayin mnemonic ga ɗaliban makarantar sakandare da ke koyon algebra, amma ɗalibai da malamai da yawa a Amurka yanzu suna amfani da kalmar''foil' 'a matsayin fi'ili ma'ana' 'don fadada samfurin binomials biyu '".