I want to split this long equation into three or four (to fit on A4 paper) maintaining an alignment with equal sign. I have tried \split
and \multline
codes, but still it won't work. Maybe because of \left[
and \right]
that enclosed the whole equation?
$$
R_i=\Delta_x\Delta_y\left[ \Delta_{1}\Delta_{2}\frac{\partial{\Delta_{21}}}{\partial{w_i}}
+ \Delta_{1}\Delta_{2}\frac{\partial{\Delta_{22}}}{\partial{w_i}}
+ \Delta_{2}\Delta_{1}\frac{\partial{\Delta_{11}}}{\partial{w_i}}
+ \Delta_{2}\Delta_{1}\frac{\partial{\Delta_{12}}}{\partial{w_i}}
- \Delta_{10}\Delta_{20}\Delta_{21}\frac{\partial{\Delta_{11}}}{\partial{w_i}}
- \Delta_{20}\Delta_{20}\Delta_{11}\frac{\partial{\Delta_{21}}}{\partial{w_i}}
- \Delta_{10}\Delta_{20}\Delta_{12}\frac{\partial{\Delta_{22}}}{\partial{w_i}}
- \Delta_{10}\Delta_{20}\Delta_{22}\frac{\partial{\Delta_{12}}}{\partial{w_i}} \right]
$$
$$
is deprecated in LaTeX documents. See the posting Why is\[ ... \]
preferable to$$ ... $$
for more information on this subject.