Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.3.3)
// Compass (v1.0.0.alpha.18)
// ----

@mixin largescreen() {
	@media all and (orientation: landscape) and (min-width: 600px) and (min-height: 400px)  {
		@content;
	}
}

@mixin econ-flexbox() {
	display: -ms-flexbox;
	display: -webkit-flex;
	display: flex;
}


%flexbox { @include econ-flexbox; }
%flexbox-large {
  @include largescreen {
    @include econ-flexbox;
  }
}

.test1 {
  @include largescreen {
    @extend %flexbox-large;
  }
}

.test2 {
  @include largescreen {
    @extend %flexbox-large;
  }
}

.test3 {
  @extend %flexbox;
}

SassMeister-output.css

.test3 {
  display: -ms-flexbox;
  display: -webkit-flex;
  display: flex;
}

@media all and (orientation: landscape) and (min-width: 600px) and (min-height: 400px) {
  .test1, .test2 {
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
  }
}