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x in (-oo:+oo)
e^3*x = 1/64 // - 1/64
e^3*x-(1/64) = 0
e^3*x-1/64 = 0
e^3*x-1/64 = 0 // + 1/64
e^3*x = 1/64 // : e^3
x = 1/64/(e^3)
x = 1/64/(e^3)
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