Multiples of unit fractions, write the fractions a product of a whole number and unit fraction

Find the difference (8ab+a+2) - (3ab+6)

How many ordered pairs of positive integers satisfy xy=32?

Is the response to the survey question "did you smoke in the last week question mark "response to the survey question "did you smoke in the last week? " a discrete random variable, a continuous random variable, or not a random variable?