∫（lnx/x^3）dx

Integration by parts
∫(lnx/x^3)dx
=lnx·-1/(2x²) - ∫(1/x)·-1/(2x²)dx
=-(lnx)/(2x²) + ∫1/(2x³)dx
=-(lnx)/(2x²) - 1/4x² + C

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