Translate the following verbal phrase into mathematical phrase.

1. a number c increased by six
2. twelve decreased by a number m
3. four times a number × decreased by two
4. the sum of a number n and seven multiplied by two
5. eight times a number × increased by two
6. the quotient of n and 4
7. twenty multiplied by the sum of x and y
8. ten times a number r increased by fifteen
9. thirty added to the quotient of a number y and five​