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CODE:
Constant a=0.1,b=0.2;
Parameter x(2)>0;
Function
a=(1+(0.0172*x1)^2)^(-x2/2);
b=x2*arctan(0.0172*x1);

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CODE:
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x1: 4153872069.82282
x2: 0.127323955608027

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