Question 880136
Important is know exactly how what you are given is written.

12-2*6+2/....?


You showed a space between the 2 and the n, so this is not clear.


Another guess:
{{{12-2*6+2/2n}}}


Look from left to right and do multiplications and divisions first.
{{{12-12+1/n}}}


Look from left to right and do additions and subtractions in the order which they occur.
{{{0+1/n}}}
{{{highlight(1/n)}}}