I need someone to simplify the following..
1) -m - 6m
2) 8-m-6m

1) -7m
2) 8-7m
What you do is you all like variables.
So -m and -6m you add them and get -7m.
8-m-6m you add -m and -6m and get -7m that means your equation would be 8-7m

Just tell koda to adjust the number of shapes himself.