True?
>>7961357
>doing maths in pen
>>7961373
What's wrong with doing maths with a pen? That's how it's always been done ever since there were pens or pencils.
>>7961373
did u graduated in liberal arts?
>>7961357
bump
>>7961521
it seems ok, if A is a plane
>>7961373
>maths
>mathsematics
>>7962542
We are /sci/ after all.