Answer:
The exponent of m is -5
Explanation:

The first step is to check if the coeeficient is in its simplest form. It is because the lowest common multiple of 27 and 56 is 1.
The second step is to subtract the exponents of identical variable/numbers with the same base. for n it is 3 minus 1 = 2. For m it is 1 - 6 = -5