84-[8-(-2)^3

To solve $${\mathtt{84}}{\mathtt{\,-\,}}\left[{\mathtt{8}}{\mathtt{\,-\,}}{\left(-{\mathtt{2}}\right)}^{{\mathtt{3}}}\right]$$, first do the exponents.

$${\left(-{\mathtt{2}}\right)}^{{\mathtt{3}}} = \left(-{\mathtt{8}}\right)$$

Now, subtract $$\left(-{\mathtt{8}}\right)$$ from $${\mathtt{8}}$$.

$$8-(-8)=$$ $${\mathtt{8}}{\mathtt{\,\small\textbf+\,}}\left({\mathtt{8}}\right) = {\mathtt{16}}$$

Finally, subtract $${\mathtt{16}}$$ from $${\mathtt{84}}$$.

$${\mathtt{84}}{\mathtt{\,-\,}}{\mathtt{16}} = {\mathtt{68}}$$

So, $${\mathtt{68}}$$ is our final answer. 

Hope this helps!

unbalanced brackets

He meant this:

$${\mathtt{84}}{\mathtt{\,-\,}}\left[{\mathtt{8}}{\mathtt{\,-\,}}{\left(-{\mathtt{2}}\right)}^{{\mathtt{3}}}\right]$$

Well then why don't you anwer it Dragon.

Yeas I will. Tomorrow cause I will go to bed!

Goodnight Dragon

I left a few around that you could answer Dragon but you'll have to hunt them down.  

Ok. Later I will cause I got to go to school! Bye!

Have a good day Dragon.