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s in (-oo:+oo)
s*((19*s^2+10)/7)+(1/3)*s = 0
(s*(19*s^2+10))/7+s/3 = 0
(3*s*(19*s^2+10))/(3*7)+(7*s)/(3*7) = 0
3*s*(19*s^2+10)+7*s = 0
57*s^3+37*s = 0
57*s^3+37*s = 0
s*(57*s^2+37) = 0
57*s^2 = -37 // : 57
s^2 = -37/57
s = 0
s/(3*7) = 0
s/(3*7) = 0 // * 3*7
s = 0
s = 0
s = 0
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