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6 Why does $u$-substitution not work here? jun 4 '14
5 Example of a real-life graph with a “hole”? nov 30 '11
5 Arbitrarily discarding/cancelling Radians units when plugging angular speed into linear speed formula? feb 28 '13
5 Dealt 3 cards. Odds of being dealt any pair? mar 3 '13