Question 331100
{{{(9m^2n - 8mn + 4mn^2) - (7m^2n + 6mn - 7mn^2)}}}
{{{9m^2*n - 7m^2*n - 8m*n + 6m*n + 4m*n^2 - 7m*n^2}}}
{{{2m^2*n - 2m*n - 3m*n^2}}}
{{{m*(2m*n - 2n - 3n^2)}}}
{{{m*n*(2m - 2 - 3n)}}}
2,-2,and -3 are coefficients
There are no constants
m and n are the variables
Maybe they want something else, but
I don't know what it could be