# math

posted by
**Al**
.

5 4 10b b 6 ?

5a 2a 40 2 2 5c

The above numbers are presented in 3 sets of 4 boxes each.

What is the missing algebraic expression in the box in the last set?

posted by
**Al**
.

5 4 10b b 6 ?

5a 2a 40 2 2 5c

The above numbers are presented in 3 sets of 4 boxes each.

What is the missing algebraic expression in the box in the last set?