:2*(sin($[(random(0.2)+0.5)*pi/$xrange]*t+$[random(2*pi)])^2)^$[random(1)+1.1]-1
($[random(0.3)-0.15]*t^2+t)
:abs(2*sin($[(random(0.2)+0.5)*pi/$xrange]*t+$[random(2*pi)]))-1
($[random(0.3)-0.15]*t^2+t)
:min($[random(1)+2.3]*sin($[(random(0.2)+0.5)*pi/$xrange]*t+$[random(2*pi)])^2,2)-1
($[random(0.3)-0.15]*t^2+t)
:2*exp(-$[random(1)+0.5]*(t+$[random(2)-1])^2)-1
:2.3*t*exp(-t^2)
($[random(0.2)-0.1]*t^2+$[random(0.6)+0.7]*t+$[random(2)-1])
:sin($[random(1)+2]*atan(t+($[random(2)-1]))+$[random(2*pi)])
