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n in (-oo:+oo)
(1/2)*(4*n+6)-((1/4)*(8*n-12)) = (1/4)*(4*n-8) // - (1/4)*(4*n-8)
(1/2)*(4*n+6)-((1/4)*(8*n-12))-((1/4)*(4*n-8)) = 0
(1/2)*(4*n+6)+(-1/4)*(8*n-12)+(-1/4)*(4*n-8) = 0
1/2*(4*n+6)-1/4*(8*n-12)-1/4*(4*n-8) = 0
1/2*(4*n+6)-1/4*(8*n-12)-1/4*(4*n-8) = 0
2-n+6 = 0
8-n = 0
8-n = 0
8-n = 0 // - 8
-n = -8 // * -1
n = 8
n = 8
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