Simply write what you read!
"Write an expression"
This means no equal sign.
"for the calculation 5 times the number 25"
5 x 25
"and then subtract the quotient of 14 and 7"
- 14/7
Combine them together and you get:
5 x 25 - 14/7
Remember to use your Order of Operations, aka PEMDAS
You would multiply and divide the numbers first, and then subtract the product (answer to a multiplication problem) and quotient (answer to a division problem)!