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HELP

function f(x) { y = 1/0; return y }

aX = -1.5; bX = 1.5; aY = -0.5; bY = 2.5
Dx = 1/2; Dy = 1/2

Qx=[0,1,-1]; Qy=[2,1,0]; Q1x=[-1/6]; Q1y=[5/6]

R=1.178511301977579; P=-1/6; Q=5/6; gr1=0;gr2=360
 function XX1(t) {x=Math.cos(t)*R+P; if(Ix(x)<1){x=1/0}; return x}
 function YY1(t) {y=Math.sin(t)*R+Q; if(Ix(x)<1){x=1/0}; return y}; t1=Math.PI/180*gr1; t2=Math.PI/180*gr2
 for(j=0;j<=5e3;j=j+1) {t=t1+(t2-t1)/5e3*(j-1);L1x[j]=XX1(t);L1y[j]=YY1(t)}