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  1. 50+ Mathematics Books for Free! [PDF] - InfoBooks.org

  2. 25+ General Math Books for Free! [PDF] - InfoBooks.org

  3. Basic Algebra with Applications - 6th Edition - Open Textbook

  4. Fundamentals of Mathematics - Open Textbook Library

  5. Free Math Textbooks - Open Culture

  6. Calculus Volume 1 - Open Textbook Library

  7. 460 Free Textbooks – Math, Science, and More [Online PDF for …

  8. Algebra and Trigonometry 2e - OpenStax