The total number of miles Reuben biked last year and this year is the sum of the miles he biked last year and this year.
You can represent the total number of miles he biked as:
Total miles = 496 + m
Where 496 is the number of miles biked last year and m represents the number of miles biked this year.
So the expression for the total number of miles he biked is 496 + m