{x∈R:−∞<x≤b}\{x \in \mathbb{R}:-\infty<x \leq b\}{x∈R:−∞<x≤b}
{x∈R:−∞<x<b}\{\mathrm{x} \in \mathbb{R}:-\infty<\mathrm{x}<\mathrm{b}\}{x∈R:−∞<x<b}
{x∈R:−∞≤x<b}\{x \in \mathbb{R}: - \infty \leq x<b\}{x∈R:−∞≤x<b}
{x∈R:−∞≤x≤b}\{x \in \mathbb{R}:-\infty \leq x \leq b\}{x∈R:−∞≤x≤b}
