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\begin{equation*}
\begin{split}
\Delta B_m^{(\text{Т})} &= \left(\left(\frac{\upmu_0N}{2L}\left(\frac{\frac{1}{2}L - z}{\sqrt{R^2 + (\frac{1}{2}L - z)^2}} + \frac{\frac{1}{2}L + z}{\sqrt{R^2 + (\frac{1}{2}L + z)^2}}\right)\Delta I\right)^2 + \right.\\
&+ \left(\frac{\upmu_0NI_mD}{8L}\left(\frac{\frac{1}{2}L - z}{\sqrt{(\frac{D^2}{4} + (\frac{1}{2}L - z)^2)^3}} + \frac{\frac{1}{2}L + z}{\sqrt{(\frac{D^2}{4} + (\frac{1}{2}L + z)^2)^3}}\right)\Delta D\right)^2 + \\
&+ \left(\frac{\upmu_0NI_m}{4L^2}\left(\frac{L(\frac{1}{2}L - z)^2}{\sqrt{(R^2 + (\frac{1}{2}L - z)^2)^3}} + \frac{L(\frac{1}{2}L + z)^2}{\sqrt{(R^2 + (\frac{1}{2}L + z)^2)^3}} - \right.\right. \\
&- \left.\left.\frac{2z}{\sqrt{R^2 + (\frac{1}{2}L - z)^2}} + \frac{2z}{\sqrt{R^2 + (\frac{1}{2}L + z)^2}}\right)\Delta L\right)^2 + \\
&+ \left(\frac{\upmu_0NI_m}{2L}\left(\frac{(\frac{1}{2}L - z)^2}{\sqrt{(R^2 + (\frac{1}{2}L - z)^2)^3}} - \frac{(\frac{1}{2}L + z)^2}{\sqrt{(R^2 + (\frac{1}{2}L + z)^2)^3}} - \right.\right. \\
&- \left.\left.\left.\frac{1}{\sqrt{R^2 + (\frac{1}{2}L - z)^2}} + \frac{1}{\sqrt{R^2 + (\frac{1}{2}L + z)^2}}\right)\Delta z\right)^2 \right)^{\frac{1}{2}}
\end{split}
\end{equation*}