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# Math
Math can be applied directly to variable values.
## Examples
```smarty
{$foo+1}
{$foo*$bar}
{* some more complicated examples *}
{$foo->bar-$bar[1]*$baz->foo->bar()-3*7}
{if ($foo+$bar.test%$baz*134232+10+$b+10)}
{$foo|truncate:"`$fooTruncCount/$barTruncFactor-1`"}
{assign var="foo" value="`$foo+$bar`"}
```
> **Note**
>
> Although Smarty can handle some very complex expressions and syntax,
> it is a good rule of thumb to keep the template syntax minimal and
> focused on presentation. If you find your template syntax getting too
> complex, it may be a good idea to move the bits that do not deal
> explicitly with presentation to PHP by way of plugins or modifiers.