texmath-0.6.7: tests/writers/divergence.tex
\nabla \cdot \overrightarrow{{v}}=\frac{\partial {{v}}_{{x}}}{\partial {x}} +\frac{\partial {{v}}_{{y}}}{\partial {y}} +\frac{\partial {{v}}_{{z}}}{\partial {z}} \nabla \cdot \overrightarrow{{v}}=\frac{\partial {{v}}_{{x}}}{\partial {x}} +\frac{\partial {{v}}_{{y}}}{\partial {y}} +\frac{\partial {{v}}_{{z}}}{\partial {z}}