$animal = 'FOX'
"The quick brown $($animal.ToLower()) jumps over the lazy dog $(2 + 3) times."
Use to insert a value in a string based on an expression
PS C:\> $animal = 'FOX' >> "The quick brown $($animal.ToLower()) jumps over the lazy dog $(2 + 3) times." The quick brown fox jumps over the lazy dog 5 times.