English: $\overrightarrow{F} \cdot \overrightarrow{n} = \frac{1}{}(12z + 18 + 12y)$ $\frac{|\nabla f|}{\left| \nabla f \cdot \overrightarrow{k}\ \right|}dA$.
Telugu: $\overrightarrow{F} \cdot \overrightarrow{n} = \frac{1}{}(12z + 18 + 12y)$ $\frac{|\nabla f|} {\ఎడమ| \nabla f \cdot \overrightarrow{k}\ \కుడి|} dA$.