var aVar = 7
var bVar = 9
var cVar = 3
var step = 0
var poly = "f(x)=x^2+9x+3\\;\\mbox{ at }\\;x=7"
var string1 = "Test"
var string2
var string3
var string4
var string5
var string6
var endString ="\\end{array}$"
var string0 = string1+endString

function writeNewEqn(){
   with(Math){
     aVar = round(10*random()+1)
     bVar = round(10*random()+1)
     cVar = round(10*random()+1)
   }
   poly="f(x)=x^2+"+bVar+"x+"+cVar+"\\; \\mbox{ at }\\;x ="+aVar
}
function writeEqn(){
     string1 = "$\\begin{array}{rcl}\\lim_{h\\rightarrow 0}\\,\\frac{f("+aVar+"+h)\\,-\\,f("+aVar+")}{h}\\,&=&"
     string2 = "\\altLink{\\lim_{h\\rightarrow 0}\\,\\frac{[("+aVar+"+h)^2+"+bVar+"("+aVar+"+h)+"+cVar+"]-["+aVar+"^2+"+bVar+"\\cdot"+aVar+"+"+cVar+"]}{h}}{Step 1.}\\\\" 
     aTmp=aVar*aVar
     bTmp=2*aVar
     cTmp=aVar*bVar
     dTmp=aVar*aVar+cTmp+cVar
     string3 = "&=&\\altLink{\\lim_{h\\rightarrow 0}\\,\\frac{[("+aTmp+"+"+bTmp+"h+h^2)+("+cTmp+"+"+bVar+"h)+"+cVar+"]-"+dTmp+"}{h}}{Step 2.}\\\\"
     aTmp=2*aVar+bVar
     string4 = "&=&\\altLink{\\lim_{h\\rightarrow 0}\\,\\frac{h^2+"+aTmp+"h}{h}}{Step 3.}\\\\"
     string5 = "&=&\\altLink{\\lim_{h\\rightarrow 0}\\,h+"+aTmp+"}{Step 4.}\\\\"
     string6 = "&=&\\altLink{"+aTmp+"}{Step 5.}\\\\"
     string0 = string1+string2+string3+string4+string5+string6+endString     
}