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@blackpenredpen2,465 videos13 yrs
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6:12How to get 1/2 of a cylinder?
54:3410 trigonometric equations that separate EXPERTS from beginners
51:5210 quadratic equations that separate experts from beginners
7:45The triangle is 1/2 of a rectangle so why is the cone 1/3 of a cylinder?
10:36Limit of x^(y^z) as (x, y, z) goes to (0, 0, 0)
