Melody

Very impressive Chris    

you can just type it into the input box.   The | is above the backslash on your keyboard :)

$${\left|{\mathtt{\,-\,}}{\mathtt{7}}{\mathtt{\,-\,}}{\mathtt{3}}\right|} = {\mathtt{10}}$$

So what was the work done on Alan?  Cause I can see the sweat rolling off that man. :/

doesn't exist

the number must be between -1 and +1

THERE IS A FRACTION BUTTON

http://web2.0calc.com/questions/how-do-i-type-in-fractions

use   asin  it is the same thing

there are too many questions, we cannot answer them all.

If you are still waiting for an answer to your own question you are best just to guide us to that one :)

Heureka beat me!     hi Heureka 

Do you want to know what shape it is?   Looks like a circle to me.   

$$\\36x^2+36y^2-24x-12y=31\\
36x^2-24x+36y^2-12y=31\\
36(x^2-\frac{2x}{3}+y^2-\frac{1y}{3})=31\\
(x^2-\frac{2x}{3})+(y^2-\frac{1y}{3})=\frac{31}{36}\\
(x^2-\frac{2x}{3}+\frac{1}{9})+(y^2-\frac{1y}{3}+\frac{1}{36})=\frac{31}{36}+\frac{1}{9}+\frac{1}{36}\\
(x-\frac{1}{3})^2+(y-\frac{1}{6})^2=1\\$$

$$\\Circle:\qquad centre\;(\frac{1}{3},\frac{1}{6})\qquad radius=1\;unit$$

Thanks Geno.

That is a really good website anon 

I can see why you find it so helpful :)

Thanks for sharing.