\left[\left\{x'(t)=\left(\begin{array}{cc} \{ & \begin{array}{cc} \sin \left(\frac{1}{x(t)^2+y(t)^2}\right) x(t) \left(x(t)^2+y(t)^2-1\right) & x(t)^2+y(t)^2\neq 1 \\ 0 & \text{True} \\\end{array} \\\end{array}\right)-y(t),y'(t)=\left(\begin{array}{cc} \{ & \begin{array}{cc} \sin \left(\frac{1}{x(t)^2+y(t)^2}\right) y(t) \left(x(t)^2+y(t)^2-1\right) & x(t)^2+y(t)^2\neq 1 \\ 0 & \text{True} \\\end{array} \\\end{array}\right)+x(t)\right\},\{x(t),y(t)\},t\right]