Alternative Equation Formats

$${\displaystyle \begin{array}{llllll}{x}_{ij4}& =& \{\begin{array}{l}\text{0 male}\\ \text{1 female}\end{array}& x_{ij6}& =& \{\begin{array}{l}\text{0 0}\\ \text{1 1}\end{array}\end{array}}$$

$${\displaystyle \begin{array}{llllll}{x}_{ij4}& =& \{\begin{array}{l}\text{0 male}\\ \text{1 female}\end{array}& x_{ij6}& =& \{\begin{array}{l}\text{0 0}\\ \text{1 1}\end{array}\end{array}}$$

\[ \begin{array}{llllll} x_{ij4}& =& \left\{ \begin{array}{l} \mbox{0 male} \\ \mbox{1 female} \end{array}\right. & x_{ij6}& =& \left\{ \begin{array}{l} \mbox{0 0} \\ \mbox{1 1} \end{array}\right. \\ \end{array} \]