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Parameters  x;
Constant  a1= , a2= , a3= , a4= , a5= , a6= ;
Constant  b1= , b2= , b3= , b4= , b5= , b6= ;
Constant  c1= , c2= , c3= , c4= , c5= , c6= ;
Constant  d1= , d2= , d3= , d4= , d5= , d6= ;
Constant  e1= , e2= , e3= , e4= , e5= , e6= ;
Constant  f1= , f2= , f3= , f4= , f5= , f6= ;
Function z1=(a3-x)/ln(a4-x)+ (a5-x)/ln(a6-x)- a1*(x-a2);
Function  z2=(b3-x)/ln(b4-x)+ (b5-x)/ln(b6-x)- b1*(x-b2);
Function  z3=(c3-x)/ln(c4-x)+ (c5-x)/ln(c6-x)- c1*(x-c2);
Function  z4=(d3-x)/ln(d4-x)+ (d5-x)/ln(d6-x)- d1*(x-d2);
Function  z5=(e3-x)/ln(e4-x)+ (e5-x)/ln(e6-x)- e1*(x-e2);
Function  z6=(f3-x)/ln(f4-x)+ (f5-x)/ln(f6-x)- f1*(x-f2);
MinFunction z1^2+z2^2+z3^2+ z4^2+z5^2+z6^2;
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