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s in (-oo:+oo)
0.013 = s/2.6 // - s/2.6
0.013-(s/2.6) = 0
0.013-0.38461538*s = 0
0.013-0.38461538*s = 0 // - 0.013
-0.38461538*s = -0.013 // : -0.38461538
s = -0.013/(-0.38461538)
s = 0.0338
s = 0.0338
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