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7*(1/14)^2-(1/14)-2 = 0
1/196*7-(1/14)-2 = 0
1/28-(1/14)-2 = 0
1/28-2-1/14 = 0
-2-1/28 = 0
-(1/28+2) = 0
-57/28 = 0
L <> R
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