You can
put this solution on YOUR website!with powers, there are very few rules to learn:

is

is

is
these are the basic three...apply them to your question
so, the a terms:

: we have division, so powers subtract: 2m-m is m -->

.
so, the b terms:

: we have division again, so m+1-1 is m -->

.
So, complete answer is
jon.