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v in (-oo:+oo)
2-((5/6)*v) > 9/4-((1/6)*v) // - 9/4-((1/6)*v)
(1/6)*v-((5/6)*v)-(9/4)+2 > 0
(-5/6)*v+(1/6)*v-9/4+2 > 0
-2/3*v-1/4 > 0 // + 1/4
-2/3*v > 1/4 // : -2/3
v < 1/4/(-2/3)
v < -3/8
v in (-oo:-3/8)
(-oo:-3/8)
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