Correct syntax for if AND/OR?

[MTGDarkness]

I can't figure out or find the correct syntax for an and/or form on the template conditionals.

[Dismounted]

<if condition="$foo == 'bar' AND $bar == 'foo'">
<if condition="$foo == 'bar' OR $bar == 'foo'">

[MTGDarkness]

Okay. And stacked? Like say I want it to be if something or something and another something? Would it then be <if condition="$foo == 'bar' OR $bar == 'foo' AND $bar2='foob'">

[Dismounted]

Treat it like algebra in maths - i.e. use brackets.