hi all!

just started a course in multivariable calculus and i'm stuck at the problem of calculating the double integral dadb / (1 + a^2 + b^2)^2 over the domain b^2 < 2a.

i guess i'm supposed to introduce polar coordinates, but i'm really unsure on the method, so i get a total mess.

if someone could walk me through this i'd really appreciate it