My tex code
\documentclass[twocolumn]{article}
\usepackage{amsmath, amsfonts, amssymb, textcomp}
\usepackage[T4, OT1]{fontenc}
\usepackage{newunicodechar}
\usepackage{unicode-math}
\usepackage{multirow}
\newunicodechar{ƒ}{{\fontencoding{T4}\fontfamily{cmr}\selectfont\m f}}
\newunicodechar{Ƒ}{{\fontencoding{T4}\fontfamily{cmr}\selectfont\m F}}
\begin{document}
\begin{equation}
\begin{align}
x\left(a + \left(b-a\right) &\frac{k-1}{N}\right)\\
&= \lambda x y
\end{align}
\end{equation}
\end{document}
and I get the output
How can you automatically size the brackets with \left and \right?
Best Answer
Assuming that this is the result you wanted to achieve:
this is a MWE to obtain it:
And these are the errors in your MWE:
align
environment inside anequation
. If you want a single equation just useequation
(with no alignment characters&
inside). If you want multiple aligned equations usealign
. But, as in your case, if you want to align stuff inside a single equation, use asplit
environment inside anequation
.\left
and\right
to "automatically size the brackets" they have to be in the same equation and there should be no&
between them. You can use\left.
and\right.
to match the missing pairs, but in your case this doesn't work well because\left
and\right
are applied to things with different size. In this case (and probably always) is much better to use fixed size commands like\biggl
and\biggr
.