If you want your equation to get a number use the label option. Surround your equation with and. These are basically placed on the centre of the page and the equations are important ones that deserve to be.
There are three ways to write a math equation in LaTeX and they are described as follows.
Here we arrange the equations in three columns. LaTeX is a programming language that can be used for writing and typesetting documents. For example k color red x mathbincolor blue - 2. For example Emc2 will give Emc2.