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S in (-oo:+oo)
S/150000 = 1500 // - 1500
S/150000-1500 = 0
1/150000*S-1500 = 0 // + 1500
1/150000*S = 1500 // : 1/150000
S = 1500/1/150000
S = 225000000
S = 225000000
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