/*
	Expressions
*/
#operations {
  	color: #110000 + #000011 + #001100; // #111111
  	// No space
  	color: #110000+#000011+#001100;
  	height: 10px / 2px + 6px - 1px * 2; // 9px
  	width: 2 * 4 - 5em; // 3em
  	text-shadow: -1px -1px 1px red, 6px 5px 5px yellow;
  	.spacing {
    	height: 10px / 2px+6px- 1px*2;
    	width: 2  * 4 - 5em;
  	}
  	substraction: 20 - 10 - 5 - 5; // 0
  	division: 20 / 5 / 4; // 1
}
/*
	Variables
*/
@x: 4;
@y: 12em;
.with-variables {
  	height: @x + @y; // 16em
  	width: 12 + @y; // 24em
  	size: 5cm - @x; // 1cm
}
@z: -2;
.negative {
  	height: 2px + @z; // 0px
  	width: 2px - @z; // 4px
}
@m: ((8 * (@z + 5) - 12) * (5 + -1));
a {
	width: (@m)px; // 48px
}
/*
	
*/
.shorthands {
  	padding: -1px 2px 0 -4px; //
}
/*
	Colors
*/
.colors {
  	color: #123; // #112233
 	border-color: #234 + #111111; // #334455
  	background-color: #222222 - #fff; // #000000
  	.other {
    	color: 2 * #111; // #222222
    	border-color: #333333 / 3 + #111; // #222222
  	}
}
/*
	Parentheses
*/
.parens {
  	@var: 1px;
 	border: (@var * 2) solid black;
  	margin: (@var * 1) (@var + 2) (4 * 4) 3;
  	width: (6 * 6);
  	padding: 2px (6px * 6px);
}
.more-parens {
  	@var: (2 * 2);
  	padding: (2 * @var) 4 4 (@var * 1px);
  	width: (@var * @var) * 6;
  	height: (7 * 7) + (8 * 8);
  	margin: 4 * (5 + 5) / 2 - (@var * 2);
  	margin: (6 * 6)px;
}
.nested-parens {
  	width: 2 * (4 * (2 + (1 + 6))) - 1;
  	height: ((2+3)*(2+3) / (9 - 4)) + 1;
}
.mixed-units {
	margin: 2px 4em 1 5pc;
	padding: (2px + 4px) 1em 2px 2;
}
/*
	As arguments to mixin
*/
.am(@index) {
	padding: @index;
}
@index: 1px;
.bm {
	.am(@index - 1);
}
/*

*/
@foo: (floor(1.2px));
h1 {
    margin: @foo;
}