.mixin (@a: 1px, @b: 50%) {

width: (@a * 5);
height: (@b - 1%);
args: @arguments;

} .mixin (@a: 1px, @b: 50%) when (@b > 75%){

text-align: center;

}

.named-arg {

color: blue;
.mixin(@b: 100%);

}

.class {

@var: 20%;
.mixin(@b: @var);

}

.all-args-wrong-args {

.mixin(@b: 10%, @a: 2px);

}

.mixin2 (@a: 1px, @b: 50%, @c: 50) {

width: (@a * 5);
height: (@b - 1%);
color: (#000000 + @c);

}

.named-args2 {

.mixin2(3px, @c: 100);

}

.named-args3 {

.mixin2(@b: 30%, @c: #123456);

}