$$\lim_{x \to 0^-} - \frac{2}{3} = - \frac{2}{3}$$ More at x→0 from the left $$\lim_{x \to 0^+} - \frac{2}{3} = - \frac{2}{3}$$ $$\lim_{x \to \infty} - \frac{2}{3} = - \frac{2}{3}$$ More at x→oo $$\lim_{x \to 1^-} - \frac{2}{3} = - \frac{2}{3}$$ More at x→1 from the left $$\lim_{x \to 1^+} - \frac{2}{3} = - \frac{2}{3}$$ More at x→1 from the right $$\lim_{x \to -\infty} - \frac{2}{3} = - \frac{2}{3}$$ More at x→-oo