About mathematics...and science

my purpose is to get a vocab of mathematician…

for exemple what does it mean "calculus"

"to compute"...

i don't know how is called

"2,4,6,8"...

but i know how is called "1,3,5,7,9…"

they are odd number …

i don't what is the oposite of the diferential 

Who mathematician could help me ? please… so much

these numbers (2,4,6,8) are called :even numbers