new_contents: def errorFunction2(x):
  	t = 1.0/(1.0+0.5*x)
  	return t*Math.exp(-x*x-1.26551223+t*(1.00002368+t*(0.37409196+t*(0.09678418+t*(-0.18628806+t*(0.27886807+t*(-1.13520398+t*(1.48851587+t*(-0.82215223+t*0.17087277)))))))))
  
subject: add another error function