$\"\"$

The sentence is four less than the square of a number.

Let n be the number.

The word “less than” indicates subtraction and the symbol is “ $\"\"$ ”

The word “square of a number” is represented by $\"\"$ . $\"\"$

Rewrite the sentence into expression as,

$\"\"$

The algebraic expression is $\"\"$ $\"\"$

The algebraic expression is $\"\"$ .