换元t=√(1-e^2x),则谨返x=ln(1-t²)/2,dx=-t/(1-t²)dt=∫t²/(t²轮晌指-1)dt=∫1+1/2(t-1)-1/腊配2(t+1)dt=t+(ln|t-1|-ln|t+1|)/2+C