Latex code for Navier-Stokes copy/paste

Because typing it in a rush is really annoying.

First equation:

\[  \Delta \cdot \overrightarrow{u} = 0\]

Second equation:

\[  \frac{d\overrightarrow{u}}{dt} = - (\Delta \cdot \overrightarrow{u}) \overrightarrow{u} - \frac{1}{p} \Delta p + v \Delta^2\overrightarrow{u} + \overrightarrow{F} \]

And a bonus, F = ma:

\[ \overrightarrow{F} = m\overrightarrow{a} \] 

Results:



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