 Elements of Algebra by Leonhard Euler

The publisher's historical-edition description dates the original German book to 1770. The linked reproduction is an English edition. Cited for the subject's continuing association with general numerical operations and the solution of equations.

Online source: www.cambridge.org/core/books/elements-of-algebra/2F888DC50EEDB8F4B7A4B7E17BC131D9