A first discovery was that 1+1 is 2.
Here is an important equation:
$$ \begin{equation} 2+2 = 4 \tag{1} \end{equation} $$As shown in (1), 2 and 2 is 4.
© 2022, Hans Petter Langtangen, Simula, Kaare Dump. Released under CC Attribution-NonCommercial 4.0 license
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