What is
$$\int_0^1 \int_0^1 \frac{ dx \; dy}{1+xy+x^2y^2} ? $$
Can you do one of the integrals and turn it into a single integral? I get lost in a sea of inverse tangents.
What is
$$\int_0^1 \int_0^1 \frac{ dx \; dy}{1+xy+x^2y^2} ? $$
Can you do one of the integrals and turn it into a single integral? I get lost in a sea of inverse tangents.