let git it back

I made a function in script "length(x,y) = sqrt((x^2)+(y^2))".
When I typed in "plot(length(x,2))".
I received this error "Error: Unexpected operator ) (char 2)"

Also "plot(sin(x*0.2))" makes a sine wave with some spiky lines that aren't supposed to be there.
Image:
http://postimg.org/image/7jdl8mcv3/

this is needed for more algebra

"plot(cos(t*tau),sin(t*tau),0:1,0.01)" makes a circle.
Like in Desmos: http://postimg.org/image/49tw1bytr/

In script:
this.functions=[
"plot1(x) = plot(x,0:1,0.002)"
];

In calculator:
"plot1(fract(x*2))"

Error:
": Error. Undefined symbol plot1"

Executing the same function within a function makes a "not defined" error message

That basically simplifies fractions, radicals, etc.

Please keep the green background from changing to black. It's hard to see what you're typing!!! I'm using chrome.

simplifying fractions

Im not sure if it is missing or I just cant find it but I cant find the function that switched fromdeg to rad and vise versa

log(8,2) returns 2.9999999...
log(32,2) returns 4.999999...
log(27,3) returns 2.999999...
log(125,5) returns 3.00000...
etc.

While technically not incorrect, this makes copy/pasting tedious, etc.

being able add or subtract from totals/results