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A in (-oo:+oo)
((8+12)^5)/6-(5*A) = 11 // - 11
((8+12)^5)/6-(5*A)-11 = 0
((8+12)^5)/6-5*A-11 = 0
1599967/3-5*A = 0 // - 1599967/3
-5*A = -1599967/3 // : -5
A = -1599967/3/(-5)
A = 1599967/15
A = 1599967/15
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