back in school I used I'd occasionally be back at mom's house and be leaving reams of used computer paper around covered with math, physics, engineering homework. My ordinary handwriting is terrible but for some reason my math handwriting can be very neat. Practice probably.
Mom once picked up a stack and asked what all that was. I told her it was math. She looked at it again for a bit, shook her head, and said.. "well.. it's very pretty".