<\body> provides three main ways in order to enter a mathematical formulas into the main text: <\description> or > This entry corresponds to small like +b=c> inside a textual paragraph. Note that formulas are typeset specially so they do not take too much vertical space. For example, limits are always displayed on the left. Limits can be displayed below in formulas with . In formulas, formula style is off by default. or > This entry is used for entering bigger , like <\equation*> x+y=z, which are typeset in a paragraph of their own. You may use the shortcut in order to give the equation a number (or to remove the number of an equation). Also, allows you to switch between inline formulas and displayed equations. or > This entry allows you to create an , a three columns wide table-like environment (see ). This environment is typically used for lists of multiple relations like <\eqnarray*> ||>|x|)>>||>|||>|+z>||>>>> The first column is centered to the right, the second one at the middle and the last one at the left. An other typical use of the environment is a step by step computation <\eqnarray*> +sin \|)>>|||)>+|)>>>|||*\+|)>*sin \>>|||*cos x+\*sin \,>>>> in which many entries of the left column are left open. <\initial> <\collection>