# Equations - English

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Outline:Equations amsmath package and align and align* environments to create equations Matrix differential equation aligning two equations using &, with and without intervening text Automatic numbering of equations using align Labeling equations with the label command Cross referencing equation numbers through the ref command Inserting text between two aligned equations through the intertext command Automatic generation of equation numbers at run time allows insertion and removal of an equation from a set of equations Labeling sections and subsections for easy and fool-proof cross referencing Breaking an equation into more than one line Suppression of equation numbers in the align environment using the nonumber command Use of backslash (\) to make braces appear as braces left[, right] and also left[. (i.e. left bracking fullstop) Blank lines in the align environment is not permissible