$numPerRow:4;
$margin:2%;
$var : -((1*5%2)-(2+2-1));
$my-var:$var-1+$var-2;$var3:-100deg;
$var4:-$var3;
$var5  :    +$var3;
$var6:0 20px 0 -24px;
$var7:0 20px 0em -1px;
$var8: preserve-3d;
$var9:-($height/2);
   $var10: -($height+$width);$var11: -($height-$width);
$var12: normal normal normal 12px/20px myfont;
$height:   em(240/2);
      $easing :  cubic-bezier(.35,0,.765,-0.120);
  $width:((100%-($numPerRow*$margin))/$numPerRow);
div {
  width:((100%-($numPerRow*$margin))/$numPerRow);
transform: translateX(-$pos);   transform: translateX( +$pos );
transform: translateX($pos -3);
transform: translateX(   3-1);
font-size:percentage(12/16);
margin-top: -($height/2);top: $height * -0.1;
}@function myFn() {
@return -((1*5%2)-(2+2-1));
}