Handbook of Formula, Identity, and Equations in Mathematics is a clean, concise guide from Grade 6 to college. No fluff, no distractions-just essential formulas, identities, and equations across arithmetic, algebra, geometry, trigonometry, calculus, and beyond. Designed for quick reference, it cuts through the clutter found in typical textbooks. Ideal for students, exam prep, and anyone who wants math at their fingertips.