Simple:
* The sweet smell of cinnamon mingled with the savory aroma of roasting vegetables.
* The laughter of children mingled with the sound of birdsong.
* The colors of the sunset mingled in the sky.
Descriptive:
* The crowd at the concert was a mingling of young and old, all united by their love of music.
* Her emotions mingled - joy, relief, and a touch of sadness.
* The air was thick with the mingled scents of smoke and rain.
Figurative:
* The past and the present mingled in her mind, creating a confusing picture.
* Truth and fiction mingled in his stories, making them both captivating and unsettling.
* The lines between reality and fantasy mingled in her dreams.
More Complex:
* The crowd mingled outside the theater, eager to see the latest blockbuster.
* The artist mingled different styles of painting in her work, creating a unique and powerful effect.
* The politician's speech mingled promises with veiled threats, leaving the audience unsure of his true intentions.
Remember, "mingled" implies a combination of things that are distinct but become intertwined or blended. Choose the sentence that best fits the context and meaning you want to convey.