CONFIG

END;
INPUT

variable_group t1,t2;
function f1,f2;
constant a1,a2,e1,e2;

a1 = 3;
a2 = 2;
e1 = 1;
e2 = 3.5;

f1 = a1*(1 + t1^2/2) + a2*(1 + t2^2/2) - e1;
f2 = a1*(t1 + t1^3/6) + a2*(t2 + t2^3/6) - e2;

END;