CONSIDERE a A CURVA DADA POR x=2 sent y=2 \cos t, \operatorname{con} t \in[0, \pi]. CALCULE \int_{c} \vec{F} \cdot \overrightarrow{d e}, ONDE F(x, y)=\left(x^{2} \ln \left(x^{2}+1\right)+6 x y^{2}-y\right) \hat{\imath}+\left[\frac{1}{y+3}+(6 y+1) x^{2}+y^{2}\right] \hat{\jmath}