Marta likes to make soup during the winter months. No matter how much soup she makes, she always freezes 32 ounces to save for later, then serves what's left.

Write an expression to show the amount of soup Marta has left. Let "s" equal the number of ounces of soup Marta makes.

Symbols you can use:

+ / - / x / ➗ / ( / ) / s / 32