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u in (-oo:+oo)
14 = (3*u+6)/4+(2*u-3)/2 // - (3*u+6)/4+(2*u-3)/2
14-((3*u+6)/4)-((2*u-3)/2) = 0
(-1*(3*u+6))/4+(-1*(2*u-3))/2+14 = 0
(-1*2*(3*u+6))/(2*4)+(-1*4*(2*u-3))/(2*4)+(2*4*14)/(2*4) = 0
2*4*14-1*2*(3*u+6)-1*4*(2*u-3) = 0
112-14*u = 0
(112-14*u)/(2*4) = 0
(112-14*u)/(2*4) = 0 // * 2*4
112-14*u = 0
112-14*u = 0 // - 112
-14*u = -112 // : -14
u = -112/(-14)
u = 8
u = 8
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