$\"\"$

The sentence is the difference between the product of $\"\"$ and a number and the square of the number.

Write the sentence into expression.

Let $\"\"$ is a number.

The product of $\"\"$ and a number is $\"\"$ .

The square of the number is $\"\"$ .

The difference between the product of $\"\"$ and a number and the square of the number is $\"\"$ .

The expression is $\"\"$ .

$\"\"$

The algebraic expression is $\"\"$ .