Mid-line “And” and “Or” in Display Equations

For display-style equations that contains a list of equations, I found it tedious to write \quad \text{and} \quad before the last item in the list. Instead, I defined a \midand macro.

Definition

\newcommand{\midand}{\quad \textup{and}\quad}%
\newcommand{\midor}{\quad \textup{or}\quad}%

Examples

Code	Output
x \geq -1 \midand x \leq 1	$$x \geq -1 \quad \text{and} \quad x \leq 1$$
x \leq -1, \quad x = 0, \midor x \geq 1	$$x \leq -1, \quad x = 0, \quad \text{or} \quad x \geq 1$$