Complex sentence: The word "FOIL" was originally intended solely as a mnemonic for high-school students learning algebra, but many students and educators in the United States now use the word "foil" as a verb meaning "to expand the product of two binomials".
Split into simpler sentences: The word "FOIL" was originally intended solely as a mnemonic for high-school students learning algebra. Many students and educators in the United States now use the word "foil" as a verb meaning "to expand the product of two binomials".