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Loop your l's, and cross your sevens and your z's to avoid confusing them with ones and twos. Exaggerate the differences between your i's and your j's by looping your j's. Curve the base of your t's to avoid confusing them with f's. Math is a lot harder to do when you cannot distinguish your variables from each other and numbers.

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I go a little further on my i's. i for the imaginary unit looks very different from i for indexing.

And also make sure to distinguish between your pi's and your n's! I can't count the number of times I've mixed the two up while finding Fourier coefficients.

This is why I exaggerate the pi's top cross (like a capital T with two legs). A lot of people write pi in a way such that the top cross has no dangling edges[0]. I always try to exaggerate the unique features of symbols. One can avoid a lot of these problems by first exhausting the least overlapping symbols.

[0] See left variant: https://pm1.narvii.com/6331/cb50e106b141735ad714b934eb18ea55...

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