Melody

It could also be negative DarkBlaze :)

the first is 11-4 = 7

the second is 20-11 = 9

(47+53)/2

$${\frac{\left({\mathtt{47}}{\mathtt{\,\small\textbf+\,}}{\mathtt{53}}\right)}{{\mathtt{2}}}} = {\mathtt{50}}$$

I hope that you did well Dbg  

Yes because it can be written as 5/1

Another beautifully presented answer.  Thank you Heureka  

That is a really good question square root  :/

Thanks you Nauseated but I think that your answer needs to be expanded upon.

Nauseated - it sounds like you need a tardis for a closet.  I thought only women were supposed to have closet problems :/

And yes GirlsNightOut the concepts here are very 'out there'    

It doesn't simplify but you can factorise it

$$\\2(x^4-256)\\
=2(x^2-16)(x^2+16)\\
=2(x-4)(x+4)(x^2+16)$$

Yes, they definiely do !!   LOL

Thanks Heureka 

I always forget about that left factorial.  I am really pleased that you reminded me :))