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a in (-oo:+oo)
1.03*10^-4 = a-((5*10^-2)/165) // - a-((5*10^-2)/165)
1.03*10^-4-a+(5*10^-2)/165 = 0
0.00040603-a = 0 // - 0.00040603
-a = -0.00040603 // * -1
a = 0.00040603
a = 0.00040603
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