PLEASE UNDERSTAND THAT

In print, yes, in hand written maths I don’t mind the line
Until there’s a lowercase L, or you’re taking the absolute value of something …
I don’t really handwrite anything these days, but my brother always taught me to put a little upturned curve at the bottom of letters to differentiate them from similar-looking numbers.
5 10 111 1

Huh?

5 10 101 1010

I think I solved it

I think it’s

8 11

Which is in Roman numerals

VIII XI

But also works in arabic numerals

5 10 3 1 ———— 8 11

Checkmate god and baby Jesus.