$\"\"$

The word $\"\"$ sum $\"\"$ indicates addition operation and its symbol is $\"\"$ .

The word $\"\"$ is no more than $\"\"$ indicates is less than or equal and its symbol is $\"\"$ .

The word $\"\"$ The sum of a number n and 4 $\"\"$ indicates the expression is $\"\"$ .

The word $\"\"$ The sum of a number n and 4 is no more than 13 $\"\"$ indicates the expression is $\"\"$ . $\"\"$

The inequality is $\"\"$ .