...Oh? I see......What is that?The most beautiful numerical formula in the worldThis one is also an unknown expensesAnother unknown expenses.Don't push yourself too hard Yuuka-chanSorry Noa, but this is no time for...Smile~If we keep going like this, we gonna end in bankruptcy, bankruptcy, bankruptcy, bankruptcy.How about you to take a look at this to relax, please?Ah...❤BlissfulEuler's Identity.
Said to be exemplary of mathematical beauty because the identity links five fundamental mathematical constants: number 0, number 1, number π/phi, number e, and number i.