i get an error in \begin{equation}, i write long equation and split it using \\.
it shows an error
Package pgfplots Warning: running in backwards compatibility mode (unsuitable
tick labels; missing features). Consider writing \pgfplotsset{compat=1.7} into
your preamble
\pgfplotsset{compat=1.7}after the loading ofpgfplotsin your preamble. You should consider updating your system as the current version is 1.12 I believe. Anyway, this has nothing to do with your equation. Note that you can not just split an equation by \. You have to use asplitoralignor similar environment. – LaRiFaRi Dec 23 '15 at 07:43\multline(https://en.wikibooks.org/wiki/LaTeX/Advanced_Mathematics#Other_environments) – Karlo Dec 23 '15 at 08:04