describe the region of integration of the folowing integrals

int(between 0 and 2) int (between sqrt(4-x^2) and 0) (x^2 + y^2) dy dx

int(2 and -1) int(x+2 and x^2) (x+y) dy dx

how would I go about describing integrals like this?

sorry if it appears I havent thought about this - I have - I just have no idea how to think about it!

many thanks