108/1000, the easiest way of sketching the derivative graph

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107/1000, how u-substitution changes a complicated region to an easier one

101/1000, how to convert a limit of a Riemann sum to an integral

104/1000, integral of 1/(1+x^2), trig substitution

105/1000, how to find the critical numbers of a cubic function (ft tic-tac-toe trinomial factoring)