- #1
Ted123
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Homework Statement
Find [tex]\int \left( \int \frac{x^2-y^2}{(x^2+y^2)^2} \;dx \right) dy.[/tex]
The Attempt at a Solution
How would I go about finding [itex]\int \frac{x^2-y^2}{(x^2+y^2)^2} \;dx[/itex]?
If I made the substitution [itex]u^2=x^2+y^2[/itex] how do I go from here?