Algebra Examples

$s = \frac{(v_{1} - v_{2}) w}{2}$

Reorder factors in $\frac{(v_{1} - v_{2}) w}{2}$ .

$s = \frac{w (v_{1} - v_{2})}{2}$

$[\begin{array}{c} x^{2} & \frac{1}{2} \\ \sqrt{π} & \int x d x \end{array}]$