Use continuity to evaluate $$\lim_{ x \rightarrow 2} \arctan \left( \frac{2 x^2 - 8}{5 x^2 - 10 x} \right)$$ Enter I for $\infty$, -I for $-\infty$, and DNE if the limit does not exist. Use at least 4 decimals.

Limit =