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G in (-oo:+oo)
G/14 = 18/12.6 // - 18/12.6
G/14-(18/12.6) = 0
G/14-1.42857143 = 0
1/14*G-1.42857143 = 0 // + 1.42857143
1/14*G = 1.42857143 // : 1/14
G = 1.42857143/1/14
G = 20.00000042
G = 20.00000042
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