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(((1/5)*x^2)/3)*x^15 = 30 // - 30
(((1/5)*x^2)/3)*x^15-30 = 0
1/15*x^17 = 30 // : 1/15
x^17 = 450
x^17 = 450 // ^ 1/17
x = 450^(1/17)
x = 450^(1/17)
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