Line integral

Calculus Level 5

Let $C$ be the region enclosed by the $x$ -axis and the two circles $x^2 + y^2 = 1$ and $x^2+y^2 = 4$ (as shown by the red curves in the figure).

What is the value of $\displaystyle \oint_C (y^2\, dx + 5xy\, dy) ?$

Excel in math and science