How much is 2 to the first power minus 2 to the second power going down to 2 to the 2012 power plus 2 to the 2013 power

How much is 2 to the first power minus 2 to the second power going down to 2 to the 2012 power plus 2 to the 2013 power

How to teach you to do this:
Let a1= Write an expression
Recalculate 2a1= Write the expression for each exponent +1
Then do 2a 1- a 1, the middle item will be eliminated, the remaining two items, and then deal with it.

How to teach you to do this:
Let a1= Write an expression
Recalculate 2a1= Write the expression for each index +1
Then do 2a 1- a 1, the middle item will be eliminated, the remaining two items, and then deal with it.

If ab is a nonzero rational number, then a a b b|=

When a >0 when a >0, b >0
When a