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(1/7)*x*x^4-5 = 152 // - 152
(1/7)*x*x^4-152-5 = 0
1/7*x^5 = 157 // : 1/7
x^5 = 1099
x^5 = 1099 // ^ 1/5
x = 1099^(1/5)
x = 1099^(1/5)
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