If it's not cancelled out in multiplication such as
-3*-3=9 which cancels
-3*3=-9 which keeps
-3+8=5 which cancels
-3+-8=-11 which keeps
-18/6=-3 which keeps
-18/-6=3 which cancels
you can ss to refer back to this comment on this if you need exponent help and i'll try to get back to you as fast as i can! :)