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((-x)^9)/9-12 = -23 // + 23
((-x)^9)/9-12+23 = 0
-1/9*x^9 = -11 // : -1/9
x^9 = 99
x^9 = 99 // ^ 1/9
x = 99^(1/9)
x = 99^(1/9)
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