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n in (-oo:+oo)
n*((5*n-1)/3)-((12*n*(4*n-16))/2)-(10*n) = 0
n*((5*n-1)/3)-6*n*(4*n-16)-10*n = 0
(n*(5*n-1))/3-6*n*(4*n-16)-10*n = 0
(n*(5*n-1))/3+(-6*3*n*(4*n-16))/3+(-10*3*n)/3 = 0
n*(5*n-1)-6*3*n*(4*n-16)-10*3*n = 0
287*n-67*n^2-30*n = 0
257*n-67*n^2 = 0
257*n-67*n^2 = 0
n*(257-67*n) = 0
257-67*n = 0 // - 257
-67*n = -257 // : -67
n = -257/(-67)
n = 257/67
n*(n-257/67) = 0
(n*(n-257/67))/3 = 0
(n*(n-257/67))/3 = 0 // * 3
n*(n-257/67) = 0
( n-257/67 )
n-257/67 = 0 // + 257/67
n = 257/67
( n )
n = 0
n in { 257/67, 0 }
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