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3-((2*x^7)/24)+7 = 0
(-1/12)*x^7+3+7 = 0
-1/12*x^7 = -10 // : -1/12
x^7 = 120
x^7 = 120 // ^ 1/7
x = 120^(1/7)
x = 120^(1/7)
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