ln(e+ln(e+ln(e+...) under ONE minute,
another version, raw file, https://youtu.be/aE7aNJPq6oM

lambert W function intro: https://youtu.be/sWgNCra93D8?list=PLYesKhoem9UY0pQQagYfG0WU9U7Ys6co9

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In this video, I calculate the integral of a vector field F over a surface S. The intuitive idea is that you're summing up the values of F over the surface. ...

Learn how to solve this complex impossible-looking trig equation sin(x)=i. Of course, we need to use Euler's formula and the complex definition of sine.
sin(sin(z))=1 https://youtu.be/8dp35ZhUr_o


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Thanks to Nikhil Patro for suggesting this problem! What is the sum of the corner angles in a regular 5-sided star? What if the star is not regular, what is the sum of corner angles then? There are some neat ways to solve this. I present my favorite methods.…

integral of 1/(x^4+1) by brutal-force partial fraction, https://youtu.be/GZFQNsy3p1U
Derivative of tanh^-1(x) and coth^-1(x), https://youtu.be/GPvN5UWJlmE
Integral of sqrt(tan(x)), https://youtu.be/6v0QqJ87gdM


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