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F in (-oo:+oo)
F = 6.641*10^-11*((7.22*70*10^22)/1738) // - 6.641*10^-11*((7.22*70*10^22)/1738)
F-(6.641*10^-11*((7.22*70*10^22)/1738)) = 0
F-1.93116306*10^11 = 0
F-193116306000 = 0 // + 193116306000
F = 193116306000
F = 193116306000
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