deletions | additions       diff --git a/section_begin_enumerate_item_item__.tex b/section_begin_enumerate_item_item__.tex  index cd34473..f435173 100644  --- a/section_begin_enumerate_item_item__.tex  +++ b/section_begin_enumerate_item_item__.tex 
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\frac{dT}{dt} &=\div \vec{q_T} =   A^T_h \left( \frac {\partial^2 T}{\partial x^2} + \\  \frac {\partial^2 T}{\partial y^2} \right) + \\  \frac{\partial}{\partial z} \left( A^T_z {\partial T}{\partial 2} \right)  \frac{ds}{dt} &= \div \vec{q_s} =  A^s_h \Delta_{h} T +   \frac{\partial}{\partial z} \left(A^s_z \frac{\partial T}{\partial z}\right), \\