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v in (-oo:+oo)
12*v-(3*(4*v+2))+1/3 = 0
12*v-3*(4*v+2)+1/3 = 0
(-3*3*(4*v+2))/3+(3*12*v)/3+1/3 = 0
3*12*v-3*3*(4*v+2)+1 = 0
1-18 = 0
-17 = 0
-17/3 = 0
-17/3 = 0 // * 3
-17 = 0
v belongs to the empty set
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