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  1. Mathematics - Wikipedia

  2. Math - Khan Academy

  3. Mathematics | Definition, History, & Importance | Britannica

  4. Wolfram MathWorld: The Web's Most Extensive Mathematics

  5. Learning Mathematics - Math is Fun

  6. Mathematics and its branches | Britannica

  7. Math is Fun

  8. Math.com - World of Math Online

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  10. Welcome to Mathematics! - Math is Fun