Also thanks for editing and fixing the formulas.
Two editing requests. Can you repair my grammar error in this sentence, at the beginning of the third paragraph of the section called formula-based approach:
> The picture changes, however, if we let the formulas to contain an infinite number of operations.
Just nix the "to".
Also, at the end of that section, I give the computation for e, but when I view it the line is too wide for the browser, so the ending of it " \approx 2.71828" isn't visible. Can you make it all visible, by splitting the equation across two lines? I'd rather have it look awkward on two lines, than lose the concrete number that results.