You can change the problem like this:
10-[2+5/6]
now, subtract 2 from 10.
$${\mathtt{10}}{\mathtt{\,-\,}}{\mathtt{2}} = {\mathtt{8}}$$
Now, change 8 into 7 6/6
$$8\Rightarrow7\;\;\;6/6$$
Now, subtract 5/6 from 7 6/6.
$$7\;\;\;6/6-5/6=7\;\;\;1/6$$
Now, Change 7 1/6 into a fraction.
$$7\;\;\;1/6\Rightarrow\boxed{7\dfrac{1}{6}}$$
So, $$7\dfrac{1}{6}$$ is the final answer.
You can change the problem like this:
10-[2+5/6]
now, subtract 2 from 10.
$${\mathtt{10}}{\mathtt{\,-\,}}{\mathtt{2}} = {\mathtt{8}}$$
Now, change 8 into 7 6/6
$$8\Rightarrow7\;\;\;6/6$$
Now, subtract 5/6 from 7 6/6.
$$7\;\;\;6/6-5/6=7\;\;\;1/6$$
Now, Change 7 1/6 into a fraction.
$$7\;\;\;1/6\Rightarrow\boxed{7\dfrac{1}{6}}$$
So, $$7\dfrac{1}{6}$$ is the final answer.