new sample functions

main.js

@@ -19,7 +19,7 @@ function track(event) {
   }
 };
 
-randfuncs = "y=x^2@y^2=1-x^2@2e^{-x}@2x+3@\\frac{d}{dx}\\left(\\frac{1}{x}\\right)@\\int x.dx@\\frac{d}{dx}\\left(sin\\left(x\\right)\\right)@\\lambda=3@e^{-\\lambda\\cdot x}@\\left|x^2-4\\right|+2@\\frac1x@x^{-2}@x!@\\ln x@\\sum_{n=1}^{\\infinity}\\frac{x^n}{n}@\\sin x@\\tan\\left(x\\right)@\\left(x-2\\right)^2@\\Gamma\\left(x\\right)@\\sqrt x".split("@");
+randfuncs = "y=x^2@y^2=1-x^2@y<2e^{-x}@\\theta=r@2x+3@\\frac{d}{dx}\\left(\\frac{1}{x}\\right)@r<\\sin\\left(4\\theta\\right)@\\int x.dx@\\frac{d}{dx}\\left(sin\\left(x\\right)\\right)@\\lambda=3@e^{-\\lambda\\cdot x}@\\left|x^2-4\\right|+2@\\frac1x@x^{-2}@x!@\\ln x@\\sum_{n=1}^{\\infinity}\\frac{x^n}{n}@\\sin x@\\tan\\left(x\\right)@\\left(x-2\\right)^2@\\Gamma\\left(x\\right)@\\sqrt x".split("@");
 
 var randfunc_index = 0;