Question

6(x-y)n-2(x+y)3n-2(x-y)n+7(x+y)3n-(x+y)2m+5(x+y)3n-4(x-y)n

Answer 1

6(x-y)^n-2(x+y)^(3n)-2(x-y)^n+7(x+y)^(3n)-(x+y)^(2m)+5(x+y)^(3n)-4(x-y)^n

=(6-2-4)*(x-y)^n+(-2+7+5)*(x+y)^(3n)-(x+y)^(2m)

=10(x+y)^(3n)-(x+y)^(2m).