Kevin, 9, can derive difficult integral calculus formula, X Inverse Tan x super fast. He uses first line to work out and second line to rewrite his final answer. For him it is possible to integrate, derive and proof some easy formulas only a single line.
For those who know calculus may wonder where are the integral methods ? The kid had modified his own methods to keep integration process continue moving without show work.
If you want to see more videos of the kid search "kids doing Calculus"
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Math whiz kids derive calculus formula, integral of x inverse tan x table. Math whiz kids proof calculus formula, integral of x inverse tan x table.
